SCIENTIFIC ABSTRACT BRANDT, N. B. - BRANDT, S. B.

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• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000206730002-1
• Release Decision: RIF
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• Document Creation Date: November 2, 2016
• Document Release Date: June 9, 2000
• Sequence Number: 2
• Publication Date: December 31, 1967
• Content Type: SCIENCEAB

SOV/56-37-2-9/56
Investigation of the Influence of a Unilateral Compression Upon the Quantum
Oscillation of the Magnetic Susceptibility of Bismuth
value the quantity Bolorv Sm was determined (S M is the extreme
cross sectio4 of the Fermi surface with the plane.that is per-
pendicular to the A-direction, E - Fermi boundary energy,
0 -
Bohr's magneton) for certain angles between A and the
binary crystal axis. Figure 2 shows Eo/P NY), Bo/0 .for un-
compressed samples.agrees well with the theoretical value
calculated according to Landau's formulas. In the case of
unilateral compression the oscillation frequency.deoreases.
Figure 3 shows the dependence of the relative- 'variation of the
oscillation frequency on the amount of pressure appi!~A.
A(Eo/0), in the case of compression along the tr-igonal axis, is
anomalously high. At 350 kg/cm 2 the decrease of Eo/p corresponds
to such in the case of a universal compression with a pressure
of about 1000 at. The results are briefly discussed on the
basis of the aemiphenomenological theory by Kosevich. The au-
Card 2/3 thors thank Professor A. I. Shallnikov for his interest in this

SOV/56-37-2-9/56
Investigation of the Influence of a Unilateral Compression Upon the Quantum
Oscillation of the Magnetic Susceptibility of Bismuth
work. There are 3 figures and 9 references, 8 of which are
Soviet.
ASSOCIATION: Moskovskiy gosudarstvennyy univeraitet (Moscow State UniverBity)
SUBMITTED: March 13, 1959
Card 3/3

24(3),24(8)
AUTHORS: 'Brandt, N. B., Dubrovskayap A. Ye., SOV/56-37-2-46/56
Kyti , 0. W_.
TITLE. An Investigation of the Quantum Oscillations of the Magnetic
Susceptibility of Bismuth at Very Low Temperatures
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, 1959,
Vol 37, Nr 2(8), PP 572-575 (USSR)
ABSTRACT: The authors developed a method for the measurement of the
anisotropy of the magnetic susceptibility of metals and semi-
conductors at very low temperatures. These measurements
also prove to be interesting in themselves, as no investigat-
ions of the magnetic susceptibility of metals and semicon-
ductors have hitherto come to the knowledge of the authors.
In a figure the schematic design of the apparatus, which con-
sists mainly of a torsion balance, is shown and is briefly
discussed. The measurements were carried out on monocrystalline
cylindrical (3.6 mm diameter and 7-8 mm length) bismuth samp-
les produced from "Khiltger" type bismuth which had been
previously purified by a recrystallization in vacuum repeated
thirty times. For the measurements the trigonal or binary
Card 1/3 axis, respectively, were arranged perpendicular or parallel

An Investigation of the Quantum Oscillations of the SOV/56-37-2-46/56
Mag-netic Susceptibility of Bismuth at Very Low Temperatures
with the axis of suspension of the torsion balance. At very
low temperatures clearly distinguishable high-frequency
oscillations occur in the curves of the low-frequency oscil-
lations of the magnetic susceptibility. In a diagram the
torque A versus H function_,is shown for one of the anglestp
between the directions of H and the trigonal axis of the
sample. The oscillation frequency of the magnetic suscepti-
bility (or also of A ) varies under a change of H as the area
of the corresponding extremal section Sm of the Fermi surface
with the surface perpendicular to ? . The angular dependence
of Sm for the new oscillations is given in another diagram.
These oscillations can obviously be classed with a grohp of
holes, the Fermi surface of which is a surface of revolution
oblate in the direction of the trigonal axis. The high-frequen-
cy oscillations detected in the angle interval 1050 > 4 > 750
very probably belong to another group of current carriers.
The authors express their gratitude to A. M. KOBevich for
Card 2/3 discussing the results, to A. I.',~hallnikov for his constant

An Investigation of the Quantum Oscillations of the SOV/56-37-2-46/56
Magnetic Susceptibility of Bismuth at Very Low Temperatures
interest in this work, and to It. V. Volkova for her
assistance in carrying out measurements. There are
3 figures and 10 references, 4 of which are Soviet.
ASSOCIATION: Moskovskiy gosudars-luvennyy universitet (Moscow State
Unive'reity)
SUBMITTED: May 14, 1959
Card 3/3

82904
;2, q-. S-g 0 0 5/12o/60/000/02/035/052
E032/E314
AUTHOR: _.Brandt, N.B.
l
TITLE: Production of Ultrahigh Pressures%
t Low Temperatures
PERIODICAL: Pribory i tekhnika eksperimenta, 1960, No 2,
pp 131 - 133 (USSR)
ABSTRACT: The principle of the method is as follows (Figure 1).
Consider a cylindrical specimen 1 , placed in the
rigid container 2 and kept in position by the
piston 3 - It is assumed that a thin layer of an
ideal lubricant is deposited on the surface of the
specimen so that tangential stresses are absent.
When the specimen is compressed by the piston 3
the elastic deformation of the specimen leads to
the appearance of stresses which are perpendicular
to its surfaces. If the specimen and the holder are
made slightly conical, then the load on the curved
surface can be increased relative to the load on the
flat surface. If the external load P is increased
further, the load on the curved surface will increase
Card 1/4

82904
S/12o/6o/ooo/02/035/052
,q14
PO~2~
Production of Ultrahigh Pressures a 0 emperatures
more rapidly than the load on the flat surfaces
until the two become equal. When this happens,
the compression is all-sided. In practice, a
layer of graphite 50 ii thick was used as the lubri-
cant. Two types of multiplicator were emoloyed and
are shown in,Figure 2. The first type was lt!designed
for pressures of 16 - 18 katm (Figure 2a) and does
not involve external support. The second variant
(Figure 2b) was- desIgned-5fdr pressux-es up to
20 - 23 katm. This multi~)licator incorporates
external support, as shown. 'The pressure in
the wide channel of the multiplicator was produced
by freezing water solutions of ethyl alcohol
(Brandt and Tomashchik - Ref 2). In order to test
Card 2/4 the work of the multiplicators a study was made of k4_

8290)
S/120/60 000/02/035/052
1123E &3+4m
Production of Ultrahigh Pressures a e peratures
the effect of all-sided pressure on the critical
temperature* of tin. A monocrystal of tin,
3 mm in diameter and 5 - 8 mm long, was inserted
into the narrow channel of the multiplicator and
the lower support 7 was screwed in as far as
possible. Then, the piston was tightly pressed
against the specimen and the wide channel of the
multiplicator was filled with the alcohol solution
of the required concentration. The insert 4
was then placed in position and the assembled
multiplicator was placed inside a heliujn dewar.
The outer dewar was filled with liquid nitrogen
and the instrument was slowly cooled down. The
transition of the specimen into the superconducting
state was measured by measuring the mutual inductance
between two coils, one of which surrounded the
multiplicator. Figure 3 shows the transition of the
tin specimen into the superconducting state at
Card 3/45 katm and 7.4 katm. It is intended to use the
/--r :.'_

82904
S/12o/60/000/02/035/052
E?3E/&3+4
Production of Ultrahigh Pressures a 0 emperatures
device to investigate the effect of all-sided
compression on quantum oscillations in the magnetic
permeability of bismuth at low temperatures.
Acknowledgment is made to A.I. Shallnikov,
N.I. Ginzburg and G. Kytin for assistance in the
present work.
ASSOCIATION: Fizicheskiy fakulltet MGU (Plivsics Department
of Moscow State University)
SUBMITTED: January 30, 1959
Card 4/4

q, r)96
-2 Y, 700 0
AUTHOR:
TITLE:
s/12o/60/000/03/033/055
E030/E535
Brandt, N.B.
An Apparatus for the Investigation of the Anisotropy of
the Magnetic Susceptibilit of Metals at very Low
TemperaturesP 11
PERIODICAL: Pribory i tekhnika eksperimenta, 1960, No 3,
pp 114-118
ABSTRACT: An apparatus is described for measuring the anisotropy
of the magnetic susceptibility of metals and semi-
conductors at temperatures from 0.07 to 0.3*K, A sketch
of the apparatus is shown in Fig 1. Using adiabatic
demagnetization of ferric ammonium alum for cooling,
warm-up times of 60 to 70 mins are obtained from
o.o650K to O.I*K. In single crystal specimens of
bismuth, new high frequency quantum oscillations of the
magnetic susceptibility have been discovered between
0.07 and 0.10K, which have not been observed in the
liquid helium region. It is suggested that these
oscillations are associated with a group of "holes".
Card 1/2 These have as their Fermi surface a figure of revolution
. \Y

pa
81996 5/12o/60/000/03/033/055
EOO/E535
An Apparatus for the Investigation of the Anisotropy of the
Magnetic Susceptibility of Metals at very Low Temperatures
like an ellipsoid with an exten ed trigonal axis, with
a boundax-y energy of 2-5 x 10-19 ergs. Their
concentration is 3.5 X 1017 per CM3, and their effective
masses are m1 = m2 :~-O-05 mov and m3 0-7 mo, where
me is the free electron mass. Acknowledgments are
expressed to A. I. Shallnikov for his interest and
advice and to G. A. Kytin and A. Ye. Dubrovskaya for
carrying out tffe--measurenients.
ASSOCIATION. Fizicheskiy fakulltet MGU (Physics Department,
Moscow State UnivGrsity)
SUBMITTED- February 9, 1959
Card 2/2

1,7100
AUTHORS:
TITLE:
83175
S10561601039100210121044
B006/BO56
Brandt, N. B., Razumeyenko, M. V.
1M=====1
The Problem of the Effect of Impurities on the Energy
\Spectrum of Electrons in Bismuth
IV
PERIODICAL: Zhurnal eksperimentalinoy i teoreticheskoy fiziki, 1960,
Vol. 39, No. 2(8), pp. 276 - 284
TEXT: The authors inreatigated the effect of 1;d impurities upon the
quantum oscillations of magnetic susceptiLbilit ithin the temperature
ity
t i i1 a__
of
range of 1.7 - 4.2*K and various orienlMaions of the magnetic field with
respect to the crystallographic (trigonal) axes of the samples. A total
of nine samples was investigated (with 0, 0.012, 0.02, 0.025., 0-03., and
0-037 wt% of Pb). The trigonal axis was perpendicular and the binary
axis was parallel to the suspension pin of the weights. A bronze strip
served for suspension. The measuring method is described in detail in
the introduction. Fig. I shows some of the measured curves of the ani-
sotropy of magnetic susceptibility N/H2sinfcos~ as functions of
1.650K and two 1-yalues near 0 and 900. (t is the angle between
J/H at
Card 1/4

83175
The Problem of the Effect of Impurities S/05 6o 039/002/012/044
on the Energy Spectrum of Electrons in B006YJ305~
Bismuth
the trigonal axis and Figs 2 shows the angular dependence of the
oscillation frequency EO/Pi- Sm for pure Bi and Bi with 0-03~ Pb. The
solid curves were calculated from a formula by Landau. As may be seen
from these diagrams, the angle of rotation of the ellipsoids of the
Fermi surfaces round the binary axes is practically independent of an
increase of the lead concentration to 0.03 wt%. (E0 denotes the Fermi
energyp Pi - the effective mass function, and Sm - the extreme faces
of intersection of the Fermi surface with the planes perpendicular to
ASM/S as a function of the lead concentration is shown in Fig. 3. The
oscilTation amplitude rapidly decreases -with growing lead concentration,
the greatest amplitude decrease could be observed in the high-frequency
range at angles near ~ - 0. This fact made it difficult to analyze the
data obtained at lead concentrations of more than 0.04 wt~o. The results
obtained by the investigations are discussed in detail according to the
individual effects. 1) The change in the shape of the Fermi surfaces
for electrons. This shape is found to be nearly independent of the lead
content up to concentrations of 0.035% Pb. 2) Change in the Fermi energy
Card 2/4

83175
The Problem of the Effect of Impurities S/056/60/039/002/012/044
on the Energy Spectrum of Electrons in B006/BO56
Bismuth
of electrons. Fig. 4 shows AEO/Eo as a function of the lead concentra-
tion 0. E. decreases nonlinearly with increasing C, 3) Changes in the
electron concentration ne. Fig- 5 shows ne(C). ne ecreases practically
linearly with increasing C. 4) Changes in the effective mass. Up to
Pb-concentrations of 0-037%, the effective electron mass practically does
not change. 5) Changes of the constant part of the anisotropy of magnetic
suaceptibility. A~e(Gj shows, according to experimentag an increase with
increasing C; theoretically, however, a decrease occurs (cf. curves 1
and 2 in Fig. 6). This shows that the change in the anisotropy of the
magnetic susceptibility of Bi occurring with C cannot be explained by
changes in the electron- and hole-parameters. It may, on the other hand,
be satisfactorily explained by Adam's theory (Ref 3), who assumes that
the bismuth valency band i's strongly diamagnetic ief. also Heinep Ref.2).
The authors finally thank A. I. Shaltnikov for his interestq M. I.
Kaganov for discussions, and G. A. Kytin for his assistance in the ex-
perimenta. There,are 7 figures and 11 references: 5 Soviet, 4 British,
and 2 US.
Card 3/4

The Problem of the Effect of Impurities
on the Energy Spectrum of Electrons in
Bismuth
ASSOCIATION:
83175
S/056,/60/039/002/012/044
B006/BO56
Moskovskiy gosudarstvannyy universitet (Moscow state
University)
SUBMITTED:
Card 4/4
March 31, 1960

88427
S/056/60/039/006/014/063
4-.?- 140 BOo6/BO56
AUTHORS: Brandt, N. B.,_ Ginzburg, 11. 1.
TITLE: Superconductivity of Crystalline Bismuth Modifications
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheakoy fiziki, 1960,
Vol. 39, No. 6(12)? pp. 1554-1556
TEXT: The authors investigated the superconductivity of the bismuth
modifications Bi II and Bi III and the stability of these modificati8ns at
helium temperatures. Bi III was known as a supercon.ductor (T c - 7.25 K
at 25,000 < p < 29,000 atm); however, the critical temperature was not
quite accurately known and was now determined with greater accuracy.
Bi II was also found to be superconductive the critical temperature
was about To . 3-93 0K (p - 25,000 atm). aT /ap amounted to about
-3.5-10- 5 deg/atm for B1 II and was for Bi III negligibly small. For in-
vestigating the stability of the superconductive modifications, experi-
ments were carried out in which a pressure was applied at room temperature,
lifted, and again applied at helium temperature. The Bi II modification,
Card 1/2

.' - A-
88427
Superconductivity of Crystalline Bismuth S/056/60/039/006/014/063
Modifications Boo6/BO56
when pressure is lifted at helium temperature, changes completely into
Bi 1. Bi IlIf formed at compressions of a Bi-single crystal, when pressure
is lifted at about - 2.2 0K, changes into the non-superconductive modifica-
tion Bi I (p 96 20,0000 atm), i.e., the transition at helium temperatures
is characterized by a strong hysteresis. Repeated compression of one and
the same specimen leads to the appearance of a finely dispersed crystalline
structure. In this case, the superconductive modification remains conserved
when pressure is lifted and changes into the non-superconductive Bi I at
6-5 - 7-50K. It may therefore be assumed that the superconductivity of
films deposited by evaporation at helium temperature is connected with the
formation of a crystalline modification analogous to Bi III. Nor is it ex-
cluded that carbon deposited by evaporation on a diamond base, crystallizes
at helium temperature with diamond structure. The authors thank A. 1.
Shallnikov and N. Ye. Alekseyevskiy for their interest and S. G.
Obruchnikov for highly qualified mechanical work. There are 3 figures,
and 7 references: 3 Soviet, 2"British, and 2 US.
ASSOCIATION: Moskovskiy gosudarstvennyy universitet (Moscow State Univer-
sity)
SUBMITTED: July 8, 1960
Card 2/2-

11 6q, I q
mo
AdTHORS: Brandt, N. B., aiid
TITLE: Investigation of
some problems of
low temperatures
'3/1 AOM/003/011/032/056
B125/BI38
01nzburg, N. 1.
the crystalline modifications of bismuth and
technique in obtaining high pressures at
PERIODICAL: Fizika tverdogo tela, v. 3, no. 11, 1961, 3461-3472
TEXT: The authors worked out a technique for obtaining high, but very
homogeneous, pressures up to 30,000-40,000 kg/cm at low temperatures down
to 1.60K. This technique, which is very similar to the Bridgeman methodt
is used to inducet and to investigate, the superconductivity properties of
the crystalline modifications of BiII and Bi III. Unlike the Bridgeman
methodt the cylindrical sample 2 is here surrounded by a thin (^J50 4)
layer of graphite lubricant. At low temperatures, the pressure acting on
the piston 2 is created by a multiplier and by a press. With a multiplier
high pressures can be created quickly and reliably at low temperatures,
which is very useful for magnetic measurements of superconductors. With a
press of the type developed by V. 1. Khatkevich (Dokt. diss., Institut
Card 1y'-'7

3()7816
Spai 1/003/011/032/056
Investigation of the crystalline... B125/B138
fizicheskikh problem AN SSSR, Ms 1952) the load acting on the piston can be
varied during the experiment. N, Ye. Alekseyevskiy is thanked for lending
the press. The crystalline modifications of bismuth are shown in the
phase diagram in Fig. 6. According to the measurements carried out on
monocrystalline samples of bismuth of the Hilger-type (purity 99.996 0),
the electrical resistivity decreased 160-200 times during cooling from
273 to 4,20K. The trigonal axis of most of the samples coincided with
their longitudinal axis. The results of the first series of experiments,
in which pressure was created by a 2multiplier and the measurements were
carried out at 20#000-29,000 kg/cm , are shown in Figs. 7, 8, and 9. The
superconductivity of the modification Bi Ilis an unexpected result of the
experiments. In the second series of experiments the pressure was
created by means of a mechanical press at room and liquid nitrogen tempera-
tures. Results of these experiments are shown in Figs. 10, 11, 12. The
results of the investigations of Bi 1, Bi 11# and Bi III indicate the strong
influence of crystal structure and of the energy spectrum of the electrons
upon superconductivity. Hysteresis is intensified by the cooling of the
sample. As the number of cycles increases the vol-ume of the Bill1phase
being transformed into Bi I decreases. -Th16 trniisf'.~.-!rmation always occurs
Card 2#

8
S?110871761/0 0310 11/0 3 210 5 6
investigation of the crystalline ... B120138
independently of the number of cycles at the same pressure of 21,000 kg/cm2.
The superconductivity properties of Bi IIIunder 27,000 kg/cm2 do not
depend on the number of compression cycles. The Bi IIImodification can
also exist in the absence of external pressure. At nitrogen temperature,
the hysteresis of the Bi I --o-Bi III transition is weaker than. at helium
temperature. At room temperature, there is hardly any hysteresis. No new
low-temperature modification different from Bi IIIseems to exist.
A. I. Shallnikov is thanked for his interest in the present paper. There
are 15 figures and 21 references: 9 Soviet and 12 non-Soviet. The three
most recent references to English-language publications read as follows:
L. D. Jennings, C. A. Swenson. Phys. Rev., 112, 31, 1958; D. H. Bowen,
G. 0. Jones. Proo. Roy. Sod.; A254, no. 1279, 522, ig6o; D. Pines. Phys.
Rev., 109, 280, 1958-
ASSOCIATION: Moskovskiy gosudarstvennyy universitet im. M. V. Lomonosova
(Moscow state University imeni M. V. Lomonosov)
SUBMITTED: June 19, 1961
Card 310

BRANDTP N.B..; PONOMAREV,, Ya.G.
Performance of a magnetic torsion balance. Prib. i tekh.eksp.
6 no.6:114-117 Iq--D 161. (141M U,:11)
1. Fizicheaki-y fakulltet Moskovskogo gosudarstvennogo universiteta.
(Magnetic balance)

26695
S/056/61/041/005/010/038
a0 0 B109/B102
AUTHORS: Brandt, N. B., Shchekochikhina, V. V.
TITLEi Effect of antimony impurities on the de Haas - van k1phen
effect in bismuth
PERIODICALt Zhurnal eksperimentalfnoy iteoreticheskoy fiziki, v. 41,
no. 5(11), 1961, 1412'- 1420
TEXT: The de Haas - van Alphen effect in Bi-Sb alloys with an Sb con-
centration of from 0 to 1% by weight has been studied at temperatures
8 between 1.6 and 4.20K. Various orientations of the magnetic field rela-
ai tively to the crystallographic axes of the specimens have been examined.
ell The anisotropy of magnetic susceptibility- . bVH2sin-rosj as a function
of 1/H is shown in Fig. 2 (1) for a Bi specimen (Purity 99-998%,l - -350)
and in Fig. 2 (5) for Bi with 1% by weight of Bb (I = -300). 41 denotes
the. angle between the magnetic field vector and the trigonal axis"Of the
R'* specimens. Circles refer to T - 3.370K, dots to T - 1.6650K. 'Fig, 4
shows the relative variation of the quantity AS (of. Landau formula,
" Shoenberg. Phil. Trans. Roy. Soc., A245, 1,, T952; Proo. Roy. Soo., 170,

S/120/62/000/005/027/036
E039/E420
AUTHORS: jLrandt, N.B., Ginzburg, N.I.
TITLE- A method of investigating the pressure-femperature
phase diagrams at low temperatures
PERIODICAL: Pribory i teklinika eksperimentA, no.5, 1962, 161-164
TEXT: Samples of bismuth and-.cerium, (1-.9 mm diameter aild 3 to
4 nim long) are compressed between.two pistons of steel or
tungsten carbide inside a solid ring ot beryllium bronze with an
internal diameter of 2 mm and thickness 7 to 8 mm and an external
diameter of 30 to 40.mm. The pressure is measured by means of
St-2 (BF-2) strain gauges mounted on the outside of the-ring.
A ;screw device is used to apply pressure-to the pistons and the
whble apparatus is mounted inside a double Dewar.flask.
Temperatures of 1.7 to 4.20K are obtained using liquid belium'and
60'to 770K using liquid nitrogen. A pressure calibration is
.-obtained using a superconducting tin manometer at liquid helium
temperatures and, because the elastic constants of beryllium
bronze"change very little in the temperature range 4.2 to 3000K,
the calibration at room temperature differs very little from that
dard 1/2 . Q.

S/120/62/000/005/027/036
A method of investigating ... E039/E420
at 4.20K. The change in volume of the sample during compression
and at a ptia5e change is from the number of turns of
the screw mechanism which moves the pistons. In order to check
the inethod the pressure at which the phase change in cerium
occurs was measured at temperatures of 373, 293 and 770K and shown
to agree well with the results obtained by other-workers using a
different method. The phase changes BiI to BiTI and BiII to
BiIII are also observed to occur at pressures of 25.3 and
27 k'atm at 3000K which is in good agreement with the results of
Bridgeman. In order to avoid hysteresis effects data should be
obtained on the first compression cycle. The results obtained
testify to the reliability of the method for obtaining phase
diagrams at low temperatures and for pressures up to 39 k atm.
There are 5 figures.
ASSOCIATION: Flz�cheskly fakulltet MGU (Pbysics Faculty MGU)
SUBMITTED: October 30, 1961
Card 2/2

S/12o/62/ooo/oo6/028/029
E032/E-114
AUTHORS: Brandt, N.B., and Balla, D.
TlTLE: Method of studying the effect of high pressures on
the galvanomagnetic properties of metals at low
temperatures
PER10DICAL: Pribory i telchnika eksperimenta, no.6, 1962', 135-137
TEXT: 'The multiplicator used in this method was described'
in previous papers (H.B. Brandt, PTE, no.2, 1960, 131; and
H.B. Frandt, N.I. Ginzburg, Fiz. tv. tela, v-3, no.11, 1961, 3461).
Fig.1 shows a modified form of the lower part of this
multipiicator which was used in the present experiments. The
s.pecimen. 1 which was cylindrical in form (1.2 mm diameter,
3 mm long) was pressed into a silver chloride pellet and was
placed into a 3-5 mm diameter channel in the holder 2. Fo;ar
cones 3 serve as electrical leads into the high pressure chamber-;
They have a maximum diameter of I mm, are covered with 4 - 5 layer#-.
of the polymerized adhesive 'B4-2 (BF-2) and are pressed into the.-
conical apertures in the bush 4 at 16o *C. All the components
of the multiplicator are made from refined beryllium bronze with
Card 1/3

Nethod of stuOying the effbct of S/12o/62/ooo/oo6/028/029
E032/EI14
the exception of the lead packing 6 and the insert 7. The
pressure in the upper part'of the multiplicator was produced by
freezing a water solution of'.ethyl alcohol. The pressure in the
working channel of 2 at liquid helium tempertttures was
determined by measuring the 'shift in the suplerconducting
transition temperature in the tin ring 9 with the aid of the
coils 10 and 11. The entire assembly is inserted into a dewar
containing liquid helium. The apparatus has*been used to measure
the resistance of tin during the trapsition to the super-
conducting state at pressures up tq about 18 katm.
There are 3figures.
ASSOCIATIONt Fizi4;heskiy fakulltet MGU
(Physics Department, YAGU)
SUBMITTED z March 1, 1962
Card 2/3

8/056/63/044/002/014/065
B102/B186
AUTHORS: Brandt, N. B., Ginzburg, N. I.
TITLE: The critical fields in the crystalline modifications Bi II
and Bi III
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, v- 44,
no. 2, 1963, 478-480
TEXT: The modifications Bi 11 2and Bi III forming at room temperature
under a pressure of 25 tons/cm show superconductivity at T-4 T or - 3.9160K
(25 t/cm 2) and T;!~T or --30K (27-30 t/cm2). The critical fields (Ec.) were
measured for these modifications (purity 99.999%.). Superconductivity was
measured with constant temperature and slowly increasing field strength
(Bi II), and with constant field strength.and slowly increasing tempera-
ture (Bi III). H or was determined in the usual way by Octrapolating the
linear sections of the curves. The values obtained for transverse and
longitudinal fields agreed within the experimental limits of error. From
Card 1/2

S/056/63/044/002/014/065
The critical fields in the B1021BI86
the Hcr (T) curves it can be seen that Bi II io a 11soft" superconductor
whose critical-Ti~ld curve resembles tha~t of tin. Bi III is a "hard" one
~H cr /6T 2600 oe/deg, this value being aluioat independent of
)T-T cr
2
pressure in the interval 28~30 t em . There are 3 figures.
ASSOCIATION: Moskovskiy gosudarstvenny universitet (mOPCOW state
University)
SUB14ITTED: September 11, 19062
Card 2/2

g817-63
RGIC (bl -2-AFIFTCAISP,"Z5
B/oOS6/63/044/006/18-,,6/188
ACCFMION NR: AP3DO_UlS
AUMOR: Br~ndt., N. B.;- 9iniburg, N. I.
I---------------
TITIL: Study . of the effect of high, Lreas 0111 super-concluftivity in cadmilrm"
U1
f, U no. 6. 1963, 1876-2-883
SUMCE: nwral ekaper. i teor.
TOPIC TAGS: SUperconduct-i'xV in cadmitm, pr-_r~aure-dependent b-apercondactivit-y
A SSMAOT The ratio the critical temperatuxe &-&dient to the prtssire 9,.-S-dian,
of t
ih tbe critical field varve of * cadmim. is- inves-IA-gated within a. VIAI- rang'a of
he inves'
pressures, - fUrthering t vigations of N. Ye. Aleksayev5l,~iy EL-id Yu. P.
-GaydWkov (7hurral el~ertmantslltjoyri t~_O__e4Uc;h._-skcy V. 29, 195S, ". 89 5,
Nto fvand the ratio tobe negattive-wid its absolute Ya_lut, -*,,.:i te cloee to t-hat :,f.
and indiaM-type r S~Ipelzlconductora. Spectrally pare p,-; _y z~,rat,-LUI ine cadm~
cy-I Inders 2 to 3 m in d awtar and 2#5 to 3-4 m 'ong -vere twated. The efn-,,~~t
-urea up to 27 OCO atm on the critical -field curves and critical
presc
for t'he superconductive trwisition in the 0.08 + or - O.EK t4--mTerat',~p- r&vap_ v~~s
J! 'nvestiga&ted. . A large relative change in critical tampere.,"Ire, about &-,% it
26,400 atm, vas obtained. The critical taMerature whanged 1.4 4=es withir, f,-,qe
pressure interval from zero-to 26,400 atm. The investigation indicates the
Card 1/2

17606-63 LW(:L)/EFi(n)-2/EW(q)/ S/06/63/044/003/011/053~
EWT(m)/WS AFFTCASD/SSD Pu-4. WW/JD/JG 70
AUTHOR: Brandt,-N. B. and Ginzburg.-N. I?
TITLEt Effect of sntimo~, Ld lead uriticis on phase,transitions
in -.~ismuth-
PERIODICALs Zhurnal eksperimentallnoy i iekhnicheskoy fizilci, v. 44, no. 3,
194 848-851
3
TEXT: One of the authors,investi ted earlier,.Ref. 1 (N. B..Brandt and M. V.
go
%Razumayenko, ZhETF, 39, 216, 196o) and Ref..2 (N. B. Brandt and V. V.
Shchekochilffiina, ZhETF, 41, 1412, ig6i).,the affect of-Sb and Pb imnurities[kn the
~,energy spectrum of electrons in Bi-and proceeded then with the.study of effects
these same impurities (0-2.5 wt.A 'of Bi, 0-1 .2 wt.% o 'L Pb) have on the pressure-
temperature, phase diagram of Bi. The Dhase transitions were investigated
SYL
following a method described the.authors in an earlier paper (Ref. 3: PTE, 5,
161, 1962). It is found that with increase.of the concentration the region of
existence of the Bi II codification becomes narrower in the phase diagram and
apparently disappears complately:for Sb concentrations exceeding 0.8 wt. %.
,Oard 1/2

8105616
L 17606-mO 3/044/003/011/053
Effect of antimony and lead impurities.to
Pb impuritiesdo not appreciably affect the nature of the phase diagram. A
c6m,parison with the energy spectrum effects shows that while Pb impurities cause
strong chanzo3 in the electron part,of.the Fermi surface, they do not appreciably
change the characteristics of the phase trpnsition in the Pb-phase diaoram. The
Sb impurities act exactly in an.opposite fashion.. Consequently,pat helium
tempe~aturas the phase diagram is quite insensitive to the changes in-the electron
part of the Ft)rmi surface and depends vary'much ;n the changes within the
crystalline lattice, which prove to be more ~ involved than the mare change, in
impurity.concentration. There are 2 figures.
-ASSOCIATION: lbskovskiy &0sudarstvennyy.univeraitet (Moscow State University)'.
SUBRITTF.D: October 4, 1962
..Card 2/2

BRANDT, N.B.; DOLGOLENKO, T.F.; STUPOCHFNKO, N.N.
Studying the de Haas-van Alphen effect in bism-ath at ultralov
temperatures. Zhur. eksp. i teor. fiz. 45 no.5:1319-1335 N 163.
(MIRA 17:1)
1. Moskovskiy gosudarstvennyy universitet.

ACCESSION NR: AP4031141 S/0056/64/0046/004/1216/1219
AUTHORS: Brandt, N. B.1 Ginzburg, N. 1.
TITLE: Effect of high pressure on the superconducting properties
of zirconium
SOURCE: zh. eksper. i teor. fiz., v. 40, no. 4, 1964, 1216-1219
erconductivity, critical temperature,
TOPIC TAGS: zirconium, sup
critical field, pressure effect, hydrostatic compression effect,
annealing effect
ABSTRACT: Earlier work on the effect of hydrostatic compression on
the superconductivity (ZhETF v. 44, 1876, 1963) is extended from
I; cadmium to Zirconium. Pressures up to 24000 atm and a temperature
~i' range 0.08--0.8K were employed. Hydrostatic compression is shown to
cause a considerable increase in the critical temperaturet'which
reaches 70% at 24000 atm, and in the temperature gradient of the

ACCESSION NR: AP4031141
critical field, amounting on the average to 20--25% as the pressure
is changed from 0 to 20060 atm. Both annealed and unannealed sam-
ples were tested, and a stronger increase in the critical temperature
was observed in annealed samples. The results are interpreted in
light of the plastic deformation which can arise in the sample as a
result of the method used in the experiment to produce high presbure.
.,Results obtained with other metals and alloys are compared. "In
conclusion we thank V. L. Ginzburg for a discussion of the results
and N. N. Mikbaylov for graciously supplying the zirconium." Orig.
art. has: 3 figures and 1 formula.
'ASSOCIATION: Moskovskiy-gosudarstvenny*y universitet (Moscow State
.'University)
*~SUBMITTEW 240ct63.. DATE ACQ.- 07May64 ENCL: 03 t
SUB CODE: PH NO REP SOV: 005 OTHER: 004
-Card.. 2/81.

ACCESSION NR: AP4043616 S/0056/64/047/002/0455/0463
AUTHORS: Brandt, N. B.; Gaydukov, Yu. P.; Itsekevich, Ye. S.;
Minina, N.
TITLE: Effect of pressure on the oscillation effects in bismuth
SOURCE: Zh. eksper. i teor. fiz., v. 47, no. 2i 1964, 455-463
TOPIC TAGS: bismuth, quantum statistics, resistance, magnetic sus-
ceptibility, low temperature phenomenon, high pressure research,
Rermi surface
ABSTRACT*: This is a sequel of an earlier study by two of the pre-
sent authors (Gaydukov and Itskevich, ZhETF, v. 45, 71, 1963) on
the effects*of uniform compression on the quantu'm oscillations of
wthe electric resistance (Shubnikov-deHaas effect)-of zinc. The
present study is devoted to the effective uniform compression on
the quantum oscillations of the magnetic susceptibility (pressures
Card 1/4

ACCESSION NR: AP4043616
1300--1600 kg/cm2 ) and the electrical resistance (at 3000--7500
kg/CM2) in bismuth at liquid helium temperatures. The test proce-
dure is described. In addition, the influence of pressure on the
deHaas-van Alphen effect was investigated using a procedure de-
scribed elsewhere (N. B. Brandt, Ya. G. Ponomarev, PTE, no. 6, 114,
1961). The influence of uniform compression on the quantum oscilla-
tions of the electric resistance was measured by a method of Ye. S.
Itskevich (PTE, no. 4, 148, 1963). The results showed a decrease in
the oscillation frequency, amounting to 37% at 7500 kg/cm2. The re-
sults are interpreted on the basis of a model wherein the Fermi sur-
face of bismuth consists of one hole and three electron ellipsoids,
and the test results on the two effects in bismuth are in good
mutual agreement. An analysis of the influence of uniform compres-
sion on the Fermi surface shape and on other characteristics of
bismuth at low temperatures is presented. The possibility that bis-
muth would go over into a dielectric state at low temperatures is
discussed. "We thank L. F. Vereshchagin and A. I. Shallnikov for
Card 2/4

ACCESSION NR: AP4043616
their interest in this work and V. A. Sukharov for help with the
experiments." Orig. art. has: 6 figures and I table.
ASSOCIATION: Moskovskiy gosudarstvenny*y universitet (Moscow State
University); Institut fiziki vy*sokikh davleniy Akademii nauk SSSR
(Institute of Physics of High Pressures, Academy of Sciences SSSR)
SUBMITTED: 17Mar64
SUB CODE: SS
NR REF SOV: 014
ENCL: 01
OTHER: 006
.'Card 3/4

AC=ICN NRs AP4043616
AP
Dependence of oscillating part
of magnet6resistance on the
reciprocal magnetic field in-
tensity at 1.5K.
1 - p 0 2
2 - p 7500 kg/cM
Qwves shifted wxtically in
arbitrary fashicn
ENCIMUREs 01

1, 17M_65 pf~-4 TJP(c) M/W
3CESSION NR: AP5000309 S/0056/64/047/005/1653/16631
AMOR: Balls, D.; Brandt, N.-B
'TETLE: Investigation of the effect:oi~hydrostatic compression on the temperature
dBpendence of the electrlc,condu~ti-v-ity.of,bismuth
;,SOURCE: Zhurnal eksperi,mental-Inoy:!-,teoi,~-ticbeskoy fiziki, v. 47, no. 5, 1964,
-1 k M11-1 A A-14-
bismuth conductivity bist4th --carrier mobility bismuth carrier con-
cintration,.: piessurized bismuth
'ABSTRAM
The conductivity of 99.9999%-wpar~ bismuth single crystals was investiga"~
,ted under.pressures up to 25,000 atm :W directions along and perpendicular to the
t rigonal zods at temperatures betweart12 and 300K. Temperatures below 4. 1K were mes.911.
_--bthdr temperaturepj by., carbon-thermumeter, and _oppe-B--~
ured by - beUvdn~ipor tension - afid
'constantan thermocouples. The meastirements-revealed that pressure had a marked
effect on the resistivity, which boimally drops uniformly with lowering temperature,
:Increases considerably with higher pressure, and develops an upward hump at tem,,)er-:
atures below 100K, with steepness increasingly pronounced at pressures above 10,0001!
atm and up to 20,000 atm. At higher pressures, a sharp upward jump is observed vid&.
_Cord 1A
ME

ACCESSION NRO. .65,000309
ritains its achieved level at temperatures approaching zero, This levelling-off
t.i&es placefor instance, at 2.3K under 24,000 atm pressure at a resistivity val4a
290 times higher than that observed after removal of the pressure. The effect is
fully reversible, except in cases where the application of pressure differs fron
bydrostatic and causes plastic deformations of the crystal. In the latter case, a
'small residual effect was observed. It is concluded that bismuth will turn di-
ilectric tit about 26,000 atm pressure. It remains dielectric up to pressures of
~6
Pout 45,000 atm at which point bismuth changes to its superconductive modifi':Btieu~
Bi 11 and Bi III. The temperature dependence of carrier concentration was studied,*
and an attempt was made to separate the pressure effect on mobility from the Com-
~bined effect on mobility and concentration. It is shown that at temperatures higher
than the degeneration temperature, the carrier concentration follows the 312-pcrwer
law closely within the pressure Interval up to 18,000 atm. At higher pressures,
the dependence grows more pronounced and approaches the quadratic law at 25,000 atm,
At temperatures lover than that of degeneration, the dependence is generally less
pronounced and never reaches the quadratic law except perhaps at extremely low
temperatures. The main mechanism responsible for the temperature dependence of
4arrier concentration above the degeneration point is the heat excitation of car-
'Xiers resulting from the narrow overlap of energy levels. Orig. art. has:
jo figures.
C rd
WIN

cbenko, ZbETF v. 45, 1319, 1963), was further investigated at three
principal orientations of bismuth single crystals relative to the
rd
1/3

n,
b
p
INT(
UP
AP5
czami'm oio~k UPP056/65/048/004/1206/127
'AM 3 -33
RORI: Azbel* H. U BAndt
-- ilitjbt
Of - i. metal.,
a dielectrie and aingularities of electrani
-,.Ck rA2terlsticv *f netal"n etrang -magnefic elds
fizikis
48, 4,
-1205-110-09
TOPIC =3i :,scarrier denjilty.': ket-al: dielectric transformttion, mignetic field et-
Ieatp thermWynmic Wvential, obe~iical.potential
ABsukdT.- lh,~-authorz calculate,the sh'i
"ft in the boundaries of the energy bands in;
a x9ital$ necerF=7 for this 3zetal L to
burn into a dielectric. The feasibility of
su-,I:i e, zhi:ft .witli the aid of a constant =%-Metic field in illustrated using,as an
excuuDie electrons vitb a quadratic* dispersion lav. For Lnomlously minimal bands
and fer -n-&-talz of -ILbe bia=tb -type., the required field is of the order of 105--l
Oe. The dependence of iurious electronic characteriotics on the magnetic field is
ainCLyzed. 7hi.9 includes the conductivity and the thermodqn-azda and chemical poten-
tiase It io rhzm -I-hz~t at the value 9-P thn, afteld at thich the edgea of the bands
pvtg-;tjaja and their derivetives rerain constant
lccmia In coewaat~ ths ther=Vma-m1p.
I Card 312

e-
622jD.!65 331~1'(Z* IJJP(C)
ACCE3SION NR: AP5029219 MVIDD56/,6.-,/049/001/C,085/OD89
AUTHOR; RIA%ndt W* B.; GjnLln~p W. I Inn, T. A. ; Umarev, B. 4
lazarey-an''~'.--~K-f ~~ v? - V. 1.
TITIZ: IM'luence of IMurities on the 1pressure effect in thallium j-1
cy i teareticbeakoy fizild
SCLUE: Murnal ekspe~ent4WM 2 Vo 49p no* 1p 1965;
85-89
-rcury iVurity, impurity effect, pressure effect,
MIPIC. TAGS*.-. thalliui~ nercury,: me.
Ferid surface, high pre,-Sr-re _rPseareb
I.ABSTRACT:- This is a C inuailon, ot an earlier study (ZhETF v. 48, 1065,.1965) of
I the influence of inpuritios on the - aiittW Ibf tbal-
lium under pressure. In the present study.. to check on some of the hypotheses ad-
vanced in the earlier papery the authors exteaded the pr;eure range to 28,oco atm,i
and measured the press-are effect in both vurel'hnd mercur earing thallium, using
the isame tballiimi-mercury allcys as in the earlier work. Cylindrical sa-mles of
2-5 mm diameter and A-4 = lengtb were used, and the superconducting trancition
was measured with a tin manometer and recorded by -an induction method. The appa-
ratut, and procedure employed were the same as described in detail elsembere (PTE
no- 2 a
131) Xq60; M V'. 3j 3461,p X961) p apart fr= ali&t ModificatIons. It was j
-d

Vki AM503S;219.
found that at high pressures 20j'000~26,00D_ atm) the dependence of the transit,'
ion
temperature (T.) on the pressure (P) var similar for the mercury-bearing and Pare
tballium, but different at law prei3sure.,q (up to appro)dmat e1Y 7000 atrn' ) s with the
sign of the effect reverBing at a concentration - 0.9% Th. it is suggested
that this behavior of thallium, and its Lnoys is related to the characteri8tic
features of the pressure dependence of tbe density of states on the Fermi surface.
In particular, the results confirm bypotheses advanced in the earlier pape:-., that
thallium has two components in the pressure dependence of Tc, linear and nonlinear,:
and that the impurity content-affectn maimly -the nonlinear component. It is poB-
sible that the impurity dependence affents the Permi-surface topology of tballium.
Orig. art. bas: 3 figures. [02,
ASSOCIATION:* Moskovs1dy gosudarstvennyy universitet (Moscow State University);
Fizikc-teldinicbeekiy institut PJmdemii nauk MrBSR (Pbysicotecbrd-cal Institute,
_4

'A (h)/E1.-.TA
L 347:66 DIT(l)~IEPA(s)-2/giT(~)/&IP(w)/EPF(n)-2/T/la.'P(t)/SrP(b)/E~I C)
ACCESSION 11n: "B~doqo
UR/0053/65/085/003/0485/0521
AUTHOR: Brandt, N, B.; Ginzburg, W.. I, q
qq
TITLE: Effect of high pressur n
the a-up-erconducting-pMerties of metals
SOURCE: Uspekbi fizicheskikh nauk, v. 85, no* 3, 1965"k "5- 21
TOPIC TAGS: superconductivity, pressure effect, hydrostatic pressure, high
pressure, metal physical property
ABSTRACT: This is a review pair dealing with the advances made in the study of
el
e
the superconductipZ pr2perties if metals at high pressures, and particularly the
developments not treated In a 1960 rev-1ew paper by C. A. Swenson. The sections
'heading are: 1. Introduction. II. :Methods of obtaining high pressures at low
temperatures. 1. Production-of "frozen-in" pressures using an intermediate medium,
Production of "frozen-in" pressures without the use of a transmitting medium, i
3. Production of pressures directly at low temperatures using an intermediate
medium.. 4. Production of pressures directly at 'low temperatures without an in-,,
Card 1/2

-L- 3h67-66----_ --- ---
ACCESSION KH
APWqo6q,
termedi e medium. III. Effect 1~',qessure on the properties of superconductors,.
1. Tin and indi~~7 2 0 Tantalum. Mere Pballium ~75. CadmiurP 6.
Aluminum 7. ZirconiudX~d tita;niumN 8. Aljqn~ 9. Superconductivity of
crystalline modification. 10. Inves igation"of the stability of superconducting
modifications. IV, Influence of pressure and microscopic theory of supercon-
ductivity, V. Some remarks onthe prospects of furtberresearch,: Orig. art. has:
38 figures, 18 formulas,and 2 tables,
ASSOCIATION: None
SUBMITTED:. 00 00 SUB CODE- OP
NR MW SOV; 030 OTHER.*052
Card 2/2

BRANDT, N.B.; GINZBURG, N.I.
Effect of hydrostatic pressure and plastic deformation on the
superconducting properties of titanium. Zhur.eksp. i teor.fiz.
1+9 no.6:1706-1714 D 165. (YIFA 19a)
1. Moskovskly gosudarstvannyl univeraltet. Submitted June 16,
1965.

L
ACC NN AP6002707
GOURCE CODE:
AUTHOR:..,-BIrandt, N,. B. Ginzburgi we 10
ORG.# Moscow State UniversLtL Moskovskiy gosudarstvenrW universitet)
deformatiofi`
TITIE: Investigation of the effect of Istatic kessure and plastic
on the superc ducting properties of titanivn
SOURCE.-" Murnal ekspeiimentaltnay I teoreticbeskoy fizikif Ve 49* no* 6., l965,
1706-1714
TOPIC TAGS: titanium,, superconductivity., pressure effect., critical pointp plastic
deformationp critical magnetic field p hydrostatic pressure., single Crystal
ABSTRACT: This is a continuation of earlier work by the authors dealing with the
effect of pressure on the superconducting transition (ZhETF v. 46P 1216, 1964), and
is aimed at checking on the hypothesis that the superconducting transition tempera-
ture increases under pressure. The superconducting properties of samples of 99-99%
pure titanium iodide were investigated in the 0.06--o.6X region.' and the effects of
plastic deformation and hydrostatic pressures up to 26..000 atm were studied. The
experimental setup and measuring technique wer described in detail elsewhere (ZhETF
v. 44 e
p 1876j, 1963). 'The results show that plastic deformation and the surface states
of samples strongly affect the superconducting transition tempeititure and the critic
field of titanium* Near3.y-lWdrostetic pressures upto approximately 3-4,000 atm e=
produce no effect or cause a very small reversible increase in the critical tempera-

L 25694-66
ACC NRs Ar6002707
ture and field in single-crystal plastically-deformed or latbe-turned titanium samp es
regardless of their superconducting parameters. Metween 14.,000 and 26,,ODO atm,, re-
versible increases of the field and temperatvre are observed in plastically deformed
samplesp at an average rate of 1%0,7 X 10-5 deg/atm. The increase in the supercon-
ducting transition temperature of titanium under pressure confirms the hypothesis
advanced in the earlier work. Differences between the behavior of titanium and
zirconium are described and explained, and the superconducting transition tempere.-
tures of different titanium saMles are compared with the corresponding densities of
the states at the Fermi surface. Authors thamt_LJL,_EeMff for providing the p=
titanium. OrIg. art. has: 6 ftirares and 2 formulas.
SUB CODRe, 2D/ SM DA7E: 3.6jun65/ ORIG MW: oD6/ oTH FXF: 007

ACC NRI AP6023637 SOURCE CODE: U.R/O386/66/oo4/OO1/OO27/OO32
AUTHOR: Brandt, N. B.; Svist2yaYe..A-; Tsbiyev% G. Kh.
ORG: Physics Department of the-Moscow State University im. M. V. Lomonosov (Fiziches-~
kiy fakulltet Moskovskogo god-ud-ar-F-W-ennogo universltef-a)
TITLE: MwetorWsistance of bismuth fields up to 45D kOe at helium temperatures-
SOURCE: Zhurnal eksperimerrtallnoy' t1oreticheskoy fiziki. Pis1ma. Wedaktsiyu.
Prilozheniye v. 4.p no- 1,, 3W., 27-32
TOPIC TAGS: bismuth, magnetoresistancej, electric resistance., pulsed magnetic field,
glavanomagnetic effect,.carrier density, semiconductor carrier
ABSTRACT: Results are reported of an investigation of the electric resistance of
single-crystal samples of bismuth in a transverse magnetic'~Tield of intensity up to
45o at JAguid-hellumAemperature, with primary purpose of obtaining in-formation
on the character of the carrier dispersion in bismuth. Earlier investigations at
helium temperatures were made at lower field strengths (up to 3.00 kOe). The magnetic
field was produced by a pulse method and the difficulty connected with the destruction
of the sample by interaction between the eddy currents and the field was eliminated
by superimposing a constant field on the pulsed one. Samples of different shapes and
different thermal coefficients of resistivity were tested. In all cases the plats
showed a monotonic increase of the magnetoresistance with the field., following a
quadratic law up to 25 - 35 kOe., nearly linear from 25 - 35 to 2D0 k0ey followed by
Card

L 36247-66
ACC NR: AP6023637
saturation at 200 - 4W kOe, and then by a decrease. Superimposed on the monotonic
component are clearly pronounced Shubnikcrv - deHaas mgnetoresistance oscillations,,
but without the periodicity ir. the reciprocal field normally observed in weak fields.
The results are interpreted as being due to non-quadratic dispersion of the electrons
and to a linear increase in the carrier density with increasing fieldj, but definite
conclusions call for additional experiments in very, strong fields. The authors thank
M. Ya. Azbell for a diocussionj, A. 1. Shallnikov for interest in the works N. L. Shof.
man, T. V. Gorakkya, and A. N. fFaM-onava, for help with the measurements, and senior
machinist A. P. Pbpov for high-grade mechanical work. Orig. art. has: 3 figures.
SUB CODE: 2D/ MW DATE: 03*,Tg/ OPM MIF: 004/ OM REF: 005

WT (m )ZTZF-Vi P q J D,/JG
ACC NR: -AP6024864 SOURCE CODE:' IJR/0056/66/051/001/0059/0061
AUTHOR - Brandt, N. B. ; Ginzburg, N. 1.
ORG: Moscow State University (Mbskovskiy gosudarstvennyy univTitet)
TITLE: Effect of high pressure on the superconducting transition temperature of
the Mo 90 Re 10 and *Nb 75 Mo 25 alloys
SOURCE: Zhurnal eksperimentall noy i teoreticheskoy fiziki, v. 51, no. 1, 1966,
59-61 IVI Af
TOPIC TAGS: alloy, niobium alloy, temperature dependence,
pressure effect, molybdenum rhenium alloy, niobium molybdenum alloy
10
ABSTRACT: The effect of pressures up to 28, 000 atm on the superconducting
transition temperature of MogoRe and Nb hT6 . alloys has been investigated.
10 75 25
It was found that the transition temperature in Nb 7~ Mo 25 alloy decreases with
hydrostatfc- pressure whereas it increases in Mo 90 Rejo. The results obtained
1/2

L 45 J3 C~-'-)6
ACC NR. A-PG c"
were compared with the variation of the density of states oil the Fermi surface
N(O) during compression. The original article offers curves showing the N(O)
density of states dependence on the number of valence electrons, the super-
conducting transition of the Nb 75 Mo 25 alloy at various pressures, and the superr
conducting transition temperature dependence of the MogoReio and Nb 75M025
alloys on pressure. The authors thank V. V. Baron, Institute of Metallurgy,
Academy of Sciences SSSR for making available high quality alloys for the
experiment. Orig. art. has: 3 figures and 1 formula. [Based on authors'
abstract] [KPI
SUBCODE: 20/ SUBM DATE: 1lFeb66/ ORIGREF: 004/ OTHREF: 004/
2 / 2 z~-
Fe~ ~V*

'ACC 'Nk,_ki6_02~86~__i6URCE CODE I UR/0056/66/051/4ol/0108/0117
Min in
AUTHOR: Brandt, N_~_B a, N. Ya., Chzhu Chzhen".san
ORC: Moscow State University (Moskovskiy gosudarstvennyy universitet)
TITLE: Investigation of the De Haas-Van Alfen
ultralow temperatures
1~
SOURCE: Zhurn4 eksperimental'noy
1966, 108-117
effect in antimon at
`7
i teoreticheskoy fiziki, v.51, noel,
TOPIC TAGS: quantum oscillation, magnetic susceptibility .9 antimony,
effective massj_- f ermi level
ABSTRACT: The angular dependences of the period and the temperature
dependences of the quantum oscillation amplitude of the magnetic
susceptibility of antimony are investigated for two principal
orientations of the crystals at heliunfilemperatures (4.2-1.5*K) in a
magnetic field up to 19 kov. A deviation of the isoenergy surface of
antimnny from an ellipsoidal shape which does not exceed 10% and which
is in accordaace with the work of L. Re Windmiller and M. G. Priestly
is found. The possible nature of the deviation is discussed. A
pronounced deviation of the effective masses from proportionality to thi
respective cross sections Is noted which indicates that the electron

ACC NRt..AP6024869
and hole dispersion law differs greatly from the quadratic law. Orig.
art. hast 6 figures,- 2 tables, and I formula. [CS)
SUB CODEt 20/ SUBM DATEt 23Feb66/ ORIG REF: 003/ OTH REFI 007
Card 212

L 36460-66 WT(YAYT
ACC NR- Ap6ol8804
IJP(c) JD
SOURCE CODE: UR/0056/66/050/005/1260/1264
AUTHOR: Brandt, N. B.; Ginzburg, N, I,
ORG: Moscow State University (Moskovs1L1y gosudarstvennyy unilversitet)
TITLE: Temperature-pressure dependence of the superconducting tran-
sition in zinc 10
SOURCE: Zh eksper i teor fiz, v. 50, no. 5, 1966, 126o-1264
TOPIC TAGS: zinc, temperature dependence, pressure effect, super-
conducting transition
ABSTRACT: The effect of uniform pressure on the superconducting
transition temperature Tk In zinc has been investigated at pressures
up to 26,000 atm. The superconducting transitioniltemperature at
26,000 atm is reduced by a factor of 2.7. It has been shown that an
exponential function most satisfactorily describes the dependence of
Tk on pressure. The possibility of transferring a superconductor to
the normal state by subjecting it to pressure has been described.
Orig. art. has: 2 figures, 7 formulas, and 1 table. [Based on authors,
abstract) (NT)
SUB COIE: 20/ SUBM DATE: 30Dec65/ ORIG REF: 005/ OTH REF: 006
%ard 1/1 L~;

BRANDT, N.D.; GINZBUrf%G, N.I.
Crystalline modifications of bismuth and some aspects of
the technique of obtaining high pressures at low temperatures.
Fis.tver.tela 3 no,32:3461-3472 N 161. (KMA 14:10)
1. ~bskovskiy gosudarstvemiy7 universitet im. M.V.Lomonosova.
(Bismuth crystals) (Low temperature research)

CHERKASSKIY, P.Z.; BRANDT- P.A,
--- - ~A - .
Grinding of spherical surfaces in piece prodaction. Mashinostraitell
no. 503 My 164. (MIRA 17:7)

POLIM/Chemicad Technology. Chcnicnl Products and H
Their Uses. Part III, Food Inclustry,
Abs Jour : Rof Zhur-Khiniyaq Elo 159 1958, 51822
Luthor : Baski, Stanislaw; Brandt Rudolf
Inst :
Title : Another Yethoc! of Wheat Milling.
Orig Pub : Przogl. zboz.-mlynarskig 19579 L, No 6,
11-12
Abstract : No abstrl--ct.
Card : 1/1

TMDT., R.
milling grain on two rollers in a srall flour rd.11. p. A
PFZEGLAD ZROZOTAn-MUNARSKI (Polskie V4,dawnictwo Gospodaroze) Warszawa) Poland.
Vol. 3. no. 3, Mar 1959
Monthly List of East European Accessions (EM) LC., Vol. 8, no. 9, 6eptember 1959.
Uncl.

BRANDT, S.B., kandidat toklinicheakikh nauk; POXROVSKIY, N.B., kandidat
,%OV~t ~ieskikh nauk; FINKLER, I.B., inshoner.
Discussion of IU.M*Koroboy's article 'What a telephone apparatus
should be lika.0 ~.B.Brandt, I.B.Irinkler, N.B.Pokrovskii. Yost.
sviazi 14 no.1:28-29 Ja 154. MRA 7:5)
1. Rachallnik laboratorii Ufimakogo zavoda MISIP (for Brandt)
2. Dotsent YKIAS (for Pokrovokiy)
(Telephone--Apparatus and supplies) (Korobov, IU.M-)

AMIRKHANOV, Kh.l.,; BRANWP S.B red.; SHCHMAKOV, D.I., skade; IMMMERp
I.A., tekhn. red.
[Determination of the absolute age of rocks on the basis of
radioactive transformation of potassium 40 into argon 40.1 Opredelenia
absoliutnogo vozranta gorrqkh porod po radioaktivnomu prevrashchenUu
kalita 40 v argon 40. )bkbachkela, Akad, nauk SSSR, Dagestan8kii
filial, 1956. 149 p. (MIRA 11:11)
(Radioargon dating)

- -- - - - - 0
AMIRKHANOV,;-Kh-I.; BRkIDT, S.B.; BARTNITSKIY, Ye.N.
Some problems relative to the theory of the argon method of the
determination of the absolute age of rocks. Trudy Gea4oinst.-
Dag.fil. AN SSSR 1:175-187 157. (KM 14:9)
(Geological time) (Argon)

AMIRKHANOV, MI.; BRANDT, S.B.; BARTNITSKIY, Ye.N.: ANOKHINA, L.K.:
IVANOV, V.S.
Diffusion of the radiogenic argon in micas. Trudy Geol.inst.
Dag.fil. AN SSSR 1:188-193 '57. (MIRA 14:9)
(Diffusion) (Argon) (Mica)

AMIRKHANOV, Xh.I.- BRANDT ,;.R-&,BARTNITSKIY, Ye.N.; GURVICH, V.S.;
.44=4~
GASANOV, S.A.; IVANOV, V.S.
Thermal stability of radiogenic argon in the dispersion micas.
Trudy Geol.inst.Dag.fil. AN SSSR 1:194-199 '57. (MIRA 14:9)
(Argon) (Mica)

BRANDT, S. S". , G.AD I BOV) 0.101. '. lyl. I I "..S.
Detemina-tion of radInFet-nic argon in rijieral us,-*rig h;otope
dilu'lion methods. Neltod. npr. ab~5. vozy. gf,;L)I. cluj~o no.6.,
53-2 7,6914, Qmilll

3
AUTHORS: Amirkhanov, Kh. I., Member of AN Azerb. 20-4-37/52
SSR, Magatayev, K. S., and Brandt, S. B.
TITLE: Determination of the Absolute Age of Sedimentary Minerals
by Radioactive Methods (Opredeleniye absolyutnogo vozrasta
osadochnykh mineralov radioaktivnymi netodami).
PERIODICAL: Doklady AN SSSR, 1957, Vol.117,Nr 4, pp. 675-677 (USSR)
ABSTRACT: Though most of the works deal with the determination of the
age of eruptive rocks and minerals, the primary conditions
of radioactive geoohronometry can also be applied with
depositions. That requires that a precipitating mineral
contains a radioactive mother-rock, and further that the
developing daugther-rook remains well conserved in the
mineral and that it is not contained in the mineral in the
moment of precipitation. Finally it is required that the
moment of formation of the respective mineral agrees with the
moment of precipitation of all other sediments of the
respective horizon containing it. Since the absolute age
of the sylvinite could be determined (reference 1), this
problem was attacked with respect to an authigenic mineral -
glauconite (reference 2). The age of 45 samples, altogether,
Card 1/3 was determined. 26 measurements agree quite precisely with the

Determination of the Absolute Age of Sedimentary 20
-4-37t 52,
Minerals by Radioactive Methods
geological data. In 11 samples, radiogenic argon was not
found, whereas in 8 cases - on account of too small
quantities of argon - the rocks are of lower age. In no case
an increased age was determined. From this it can be concluded
that radiogenic argon was fully obtained in many samples. This
obtaining concerns a wide range of geologic ages. In one
part of the samples, the quantity of radiogenic argon was
rigorously reduced up to completely lacking. The respective
results are given in table 1. The age varies accordingly from
20 (Chokrak, miocene) to 400 (ailurian) million years. The'
too small quantity of radiogenic argon can be attributed to
paleo-temperature effects, metamorphio processes, local
warming-up and weathering with glauconite. They act here more
intensely than with magmatic rooks. Concluding, the
applications of the new method are described.
There are 1 figure, 1 table, arid 5 references, 4 of which aie
Slavic.
Card 2/3

D~-tz:rmination of the Absolute Age of Sedimentary 20-4-37/52
lliiierals by Radioactive Methods
ASSOCIATION; Daghostan Branch AN USSR (Dagestanskiy filial Akademii nauk
SSSR)
SUBMITTED: July 2, 1957
AVAILABLE: Library of Congress
Card 3/13

, RAIff!71 S. B.
_J~~
Brandt, S. B. - "'Me Method of Ms as -Spectroscopic DeterwinatIon of RaOlogen Argon
in Rocks".
report presented at the Sixth Session of the Committee for DAerriin~ng tile
Absolute Age of Geologic Formations at the Department of Geologic-Geographical
Sciences (OGGN) of the USSR Academy off Sciences at Sverilovsk in May 1957.
Izv. Ak 'Nauk SSSR, Ser. Geol., Vo. 1, 1958, P. 115-117 author PekarsXaya, T. B.

SOV/49-58-9-11/14
AUTHORS: Tabulevich, V. N., Struk, Ye. V. =d Brandt, S. B.
TITLE: Automatic Reception of Time Signals of the "Makhachkala"
Seismic Station (Avtomaticheskiy priyem signalov
vremeni seysmostantsiyey "Makhachkala")
PERIODICAL: Izvestiya Akademii Nauk SSSR, Seriya Geofizicheskaya,
1958, Nr 9, pp 1137-1138 (USSR)
ABSTRACT: Under the conditions at Makhachkala the daily variations
of the audibility of the large radio stations and also the
radio disturbances caused by the frequent hurricanes are
of great importance. For ensuring regular automatic
reception of the time signals, the personnel of the
Makhachkala seismic station developed an amplifier
(attachment to the radio receiver "Rodina") which ensures
automatic reception of time signals without the above
mentioned drawbacks. The circuit', Fig.1, is connected to
the non-symmetrical output of an additional loud-speaker
and beginz with a trigger type amplitude limiter, the
response threshold of which is so chosen that at the output
oscillations of a practically square topped shape are
obtained. This is followed by a selective amplifier with a
Cardl/3 twin T-shaped RC bridge and a cathode repeater and also an

SOV/49-58-9-11/14
Automatic Reception of Time Signals of the "blakhachkalall Seismic
Station
auxiliary resonance circuit tuned to 1000 c.p.s. The
output voltage of the amplifier is rectified by a diode and
fed into an electronic trigger relay which brings about
response of polarised relays on the output side irrespective
of their setting and also permits changing the width of the
received frequency band by changing the response threshold.
The output diode serves for absorbing parasitic pulses
which occur during switching on and switching off of the
circuit. The entire apparatus is fed from the normal
a.c. supply via a voltage stabiliser but can also be made
to operate from batteries. A wall clock with a special
contact system on the face serves for switching on and
switching off the equipment. The equipment was tested
in experimental operation and proved reliable. The
frequency band within which a strictly square topped wave
shape is obtained equals 1000 + 40 c.p.s.; at such a
frequency band neither music, Eor speech, nor surge
disturbances will cause erroneous response. The narrow
and stable frequency band has enabled detection of
Card2/3 deviation of the frequency of the time signals whichoccured

SOV/49-58-9-11/14
Automatic Reception of Time Signals of the "Makhachkala" Seismic
Station
in November, 1956. The equipment is built into
a chassis Of 180-X 250 MM.
There are is one figure.
ASSOCIATION: Akademiya Nauk SSSR,Institut fiziki Zemli
Seysmicheskaya stantsiya "Makhachkalall
(Ac.Sc. USSRInatitute of Physics of the Earth,
Seismic Station "Makhachkala")
SUBMITTED: June 22, 1957
Card 3/3

SOV/11-58-11-9/14
AUTHORS: Amirkhanov, Kh.I., gAd4rr-S'.-B~ *'Bartnitskiy, Ye.17.
_Br
TITLE: The Determination of the Absolute Age of Potash Feldspars
by the Argon Method (K opredeleniyu absolutnogo vozrasta
kaliyevykh polevykh shpatov argonovym metodom)
PERIODICAL: Izvestiya Akademii nauk SSSR, Seriya ge~logicheskaya, 1958,
Nr 11, pp 110 - 112 (USSR)
ABSTRACT: The authors propose a method to deter ~6 ne th 30 absolute age
of potash feldspars by the ratio of A and K in the perm-
anent zone of a given sample. There is 1 grapb, I table,
4 references, 1 of which is Soviet, 1 German and 2 American.
ASSOCIATIOR: Dagestanskiy filial AN SSSR, Makhachkale (The Dagestan Branch
of the AS USSR, Makhachkala)
S UBMITTED: June 5, 1958
1. Geology 2. Potassium carbonates 3. Age--Determination
4. Radioisotopes--Applications
Card 1/1

AUTHORS: A~&khanovj Khe JO . Member of the AN Azerbaydzhan SM., 2o-2-33/)io
Brandt, S, B.$ Bartnitskiyj Ye. N., Gurvich, V. S., Gasanov., S.
TITLE: Problem,of the Preservation of Radiogenie Argon in Glauconites (K vo-
prosu o sokhrannosti radiogennogo argona v glaukonitakh).
KRIODICAL-. Doki~dy AN SSSR, 1958., Vol- 118j Nr 21 PP- 328-330 (USSR)-
ABSTRACT: Glauconite was chosen for the determination of the absolute age of
sedimentary rocks due to its great structural similarity with mica,
especially with biotite, The first samples showed good results, as
far as the agreement of the absolute age with the assumed geological
age is co=erned. Beside data on a good stability of the glauconite
structure a weak potassium-linkage to the lattice (reference 4) is
indicated. The preservation of potassium and thus also of radiogenic
argon apparently depends on the state of dispersion of the micas. In
glauconites from Dagestan sometimes very small contents to complete
absence of radiogenic argon were determined. The method was described
in earlier papers (references 7-9)e In order to determine the problem
mentioned in~ the titles the dependence of the separated radiogenic,
argon on thi temperature of heating was investigated..Simultaneously
samples for an Xray structural analysis were produced. The remaininj.
Card 1/y content of argon after 8 and lo hours of heating at loo-%U5ooC is gis

Concerning the
Problem of the Preservation of Radiogenio Argon in Glauconites. 20-2-35/6o
ven in table and figure 1. About 2oc/o of radiogenic argon are alrea6y
lost from glauconite at looOC. At 5oooc argon is entirely separated.
Argon isj, for instance, much more solidly bound to muscovite and mi-
crocline. Its linkage to the crystal lattice of glauconite, however,
is very weak. As separation of argon already takes place before the
destruction. of the glauconite lattice, as the X-ray structural analy-
sis (table 2) proves. When comparing the curves of the separation of
radiogenic argon with those of the thermal analysis (reference 12p13)
it will be seen that the 2 endothermic effects (between loo and 2oo0c,
and between 5oo and 6ooOC, respectively) of the latter (separation of
the adsorbed water and loss of the water of constitution) are in agree
ment with the peaks of the curve of the separation of argon. The loss
of the adsorbed water apparently entails the loss of 2oc/o argonp
whereas; that of the water of constitution causes the separation of
the argon: residue. This also indicates a weak argon- and possibly als
so a weak potassium-linkage to the glauconite-lattice, Further inven
stigations are necessary. For determining the absolute age of the
sediments according to glauconites a sufficient knowledge of the geo-
logical history of every individual sample is necessary. Glauconite
Card 2/3 may possible be wed as material for palso-thermometric investiga=
tions.

Concerning the Problem of the Preservation of Radiogenic Argon 20-2..35/60
in Glauconites.
There are 2 figures, 2 tables, and 13 references,tl of which are
Slavic*
ASSOCIATION: Dagestan Branch of the AS USSR (Dagestanskiy filial Akademii nauk
SSSR).
SUBMITTED! June 22, 1956.
AVAILABLE: Library of Congress.
Card 3/3

I
3(8) SOV11-59-3-8/17
AUTHORS: kmirldianov, Kh.I. Bartnitskiy, Ye.N.,
Gasanov, S.A. , andgW77"ich~,V7.
TITLE: The Mechanism of Raaiogenic Argon Losses in ic-lica.
(0 mekhanizme poter' radiogennogo argona v slyuclak-h)
PERIODICAL: Izvestiya Akademil Nauk 3_38R, Oeriya Geolo-icheskaya,
1959, Nr 3, pp 104-107 (USSR)
ABSTRACT: The thermic stability of raaiogenic (r/g) argon was
tested by the above-mentioned authors in dispersed
mica. It showed that low-temperature losses (150 -
600 C) of r/g argon were incurred, beginning with
grains of the 50-100 micron order. Graphical repre-
sentations and equations were developed by having
used as basis the Langmuir order;
V bp (1)
Card l/ 4 vM I + bp

SOV/11-59-3-8/17
The Mechanism of Radiogenic Argon Losses in Mica
The coefficient b is subjected to the following
temperature dependence:
eq/RT (2)
T3~
Here v the relative quantity of the absorbed
VM
gas; p = pressure; cL= numerical coefficient depend-
ent upon the properties of the sorbent and of the
Card 2/4- gas to be absorbed; q = temperature of sorption. The

SOV/11-59-3-8/17
The Mechanism of Radiogenic Argon Losses in Mica
value q/R has usually the order 103( 10 11
8,32-107).
For the initial analysis ito is possible to use
U By using these -tolerances, the authors
t&s30r.m
fo (1) and (2). as above, applicably to this
case:
eo 30e 1000/T
_710-1 OelOOO/T
T (1 +
T
The authors arrived at the following conclusions:
1) Losses of radiogenic argon from mica up to a
temperature of 600 0 are incurred as a result of the
Card 3/4 desorption processes and are well described by the

SOV11-59-3-8/17
The Mechanism of Radiogenic Argon Losses in Mica
isotherms of Langmuir; 2) losses
resulting from a diffusion become
after a temperature of 600 C; 3)
tures, the diffusion coefficient
exceed 10-31 cm~/sea. There are
references.
of argon in mica
perceptible only
at normal tempera-
in mica is not to
4 graphs and 6 Soviet
ASSOCIATION: Dagestuanskiy filial AN SSSR, g. Makhachkala (The
Dagestan Branch AS USSR, Makhachkala)
SUBMITTED: June 5. 1958.
Card 4/4

3(5) SOV/7-59-6-8/17
AUTHQRSt Amirkhanov, Kh. I.0 =B~r~andt S. B., Bartnitakiy, Ye. N.,
Voronovskiy, S. F.
TITLE: On the Diffusion of Radiogenic Argon in Sylvites
PERIODICALs Geokhimiya, 1959, Nr 6j PP 538 - 545 (USSR)
ABSTRACTt The diffusion constants of radiogenic argon, the activation
energy of diffusion, the electrical conductivity of frequencies
of 0 - 20 megacycles and their activation energy were measured
on two different types of sylvite - red and pink - of the Soli-
kamak deposit in the temperature range of from 20 to 7000C. The
diffusion mechanism of radiogenic argon was found to differ from
the conductivity mechanism and the eigendiffusion of K+. The
activation energy of diffusion is at equal temperature higher
than the activation energy of conduntivity. Activation energy is
not likely to dea=ease at low temperature (under 2000C). It is
not possible to make spatial diffusion responsible for argon
losses occurring in the course of geological evolution* The dif-
fusion constant amounts to 10-30cm 2/ see extrapolated to a temper-
ature of 300 0K. Diffusion according to pair vacancies and
Schottky-defects is assumed to be the most probable diffusion
Card 1/2 mechanism. Argon losses by desorption at low temperature on one

On the Diffusion of Radiogenio Argon in Sylvites SOV/7-59-6-8/17
0
of the two sylvites may be explained by mosaic-struoture.
There are 5 figures and 11 references, 5 of which are Soviet.
ASSOCIATION: Dagestanskiy filial Akademi-i nauk SSSR, Makhachkala
(Dagestan Branch of the Academy of Sciences USSR, Makhachkala)
SUBMITTED: April 18, 1959
Card 2/2

5(0)
AUTHORS: Amirkhanov, Kh 1. Academician, SOV/20-125-6-48/6,11
AzerbSSR, Bran~t, S. Bartnitskiy, Ye. N.
TITLE: The Diffusion of Radiogenic Argon in Feldspars (Diffuziya
radiogennogo argona, v polevykh shpatakh)
PERIODICAL: Doklady Akademii nauk SSSR, 1959, Vol 125, Ift 6, pp 1345-1347
(USSR)
ABSTRACTs It is known that considerable losses of radiogenic argon A 40
formed in feldspars by the radioactive transformation of K40
occur in the last mentioned mineral. The linear approximations
in the references 1,2 distort the separation mechanism of A40.
The authors give in this paper investigation results of the
separation kinetics of A40 in two Precambrian feldspar samples
(Ref 3). The figures 1 and 2 give the results. The diffusion
equation for a spherical case (1) as well as the known depend-
ence of the steady diffusion on the temperature (2) are used
for the interpretation of the obtained ourves. Figure 1
(samgle Nr 1) shows that the heating curves have at 800 and
1100 horizontal sections of considerable length contrary to
Card 1/4 the dependence (1). The slope of the curve increases against

The Diffusion of Radiogenic Argon in Feldspars SOV/20..125-6-48/61
the dependence 2 periodically, in intervals which are separated
from one another by curves with a horizontal section, not'
gradually with the temperature. A part of the sample Nr 1 was
pulverized in an agate mortar in order to clarify the nature of
0
these horizontal sectionz. Portions of 1.5 g each were subjected
to differently long heating. The determination results of the
A40 which remained in these portions are indicated in figure 1
by crosses. The horizontal section is not shifted on the
vertical line, but only prolongated in the direction of the
ordinate axis. Thus its existence is caused by the structural
peculiarities, not by the grain size The2beginning of the
section is determined by the quantit; D t /r0in line with the
equation (1). The process occurring at 800 and. 1100 0 can be
interpreted as rapidly dying down diffusion which exhausts the
A40_ content in a certain stage. This stage is characterized by
values of E and Do typical of it. Therefore the curves have to
be interpreted according to A40 which belongs to each single
phase. Thus the sample Nr 1 has three phases (Fig 3: 1 and II
Card 2/4 the numbers of the phases). Figure 4 shows an analogous sub-

The Diffusion of Radiogenic Argon in Feldspars SOV/20-125-6-48/61
division of the sample Nr 2. The slope of the curves in the
figures 3 and 4 increases gradually for each phase with the
increase of t. This makes their analysis in the terms of the
equations (1) and (2) possible which confirms the rightness of
the authors' interpretation. A raster was contructed from the
equation (1) for different D-values in order to determine the
value of D The Dt-values were detected by applying this
raster to & curves of the fi res 3 and 4. 2 adjacent
Dt-values from the equation (2rwere determined. The obtained
Dt- and E-values as well as the D273 -values, extrapolated
according to the equation (2), were compiled in the table 1.
This shows that each single phase is characterized only by the
E-value typical of it. The separation of A40 is carried out at
the mentioned temperatures by diffusion. The diffusion can,
however, practically not influence the maintenance of A40 as it
is shown by the D273-values for each phase. All losses of A40
in the course of the geological time are due to the separation
from the "zero"-phase only. The variety of the feldspars is
Card 3/4 not exhausted by the two samples, though the figure and the

The Diffusion of Radiogenic Argon in Feldspars SOV/20-125-6-48/61
I
configurations of the phases differ in the two samples. There
are 4 figures, 1 table, and 3 references, 1 of which is Soviet.
ASSOCIATIONt Dagestanskiy filial Akademii nauk SSSR (Dagestan Branch of the
Academy of Sciences USSR)
SUBMITTED: December 29, 1958
Card 4/4

AUTHORS- Amirkhanov, Kh. I., Academician of the SOV/20-126-1-44/62
AS AzerbSSR, Bartnitskiy, Ye. N., ~ranAj. S._B-, Voytkevich,
G. V.
TITLE: On the Migration of Argon and Helium in Certain Rocks and
Minerals (0 migrateii argona i geliya v nekotorykh porodakh
i mineralakh)
PERIODICAL: Doklady Akademii nauk SSSR, 1959, Vol 126, Nr 1,
pp 160-162 (USSR)
ABSTRACT: The A- and He-separation from one and the same sample was
investigated in order to define precisely the loss mechanism
of the two radlogenic gases mentioned in the title. The authors
used for this purpose carbonaceous schist, hornblende, and
Precambrian pyroxene. They used the mass-speetrosoopic method
of isotopic dilution (Ref 1) which was somewhat modified for
this purpose. The measuring results are given in figures 1-3.
The diffusion coefficients D and in several cases the activation
energy E can be determined from these curves, The formula of
the spherical diffusion (2) was used for the calculation of D.
Card 1/3 The quantity of the radiogenic A 40 was measured by the usual

On the Migration of Argon and Helium.in Certain sov/20-126-1-44/62
Rocks and Minerals
method; the He4_quantity according to the formula (1).
Figure 1 shows curves for the carbonaceous schist, figure 2
for hornblende from &anite-pegmatite, figure 3 for pyroxene.
Equal D-values of argon and helium for hornblende and
pyroxene prove that the migration of the radiogcnic gases is
caused by other reasons, not by the nature of the atoms
A40 and He4. It is possible that the nodal vacancies (holes)
shift in the crystalline lattice of the mineral. Their
quantity increases with the temperature rise. They seize and
"transport" the atoms of radiogenic gases. A certain
difference of the D-value for A and He in the carbonaceous
schists is apparently due to the occurrence of several phases*
in these rocks in which the gases may be differently
distributed. The boundary layers between the individual phases
are apt to cause considerable losses in A40 and.He4 as well
in the case of low temperatures. The E- and D-values for
pyroxene prove that the radiogenic gases are fully preserved
in this rook. The authors -draw *cm Ahe aft7esa~ -.fbLcts the ocmbadoa tbat
Card 2/3., the absolute age is to be determined by the argon- and helium

On'ihe Migration of Argon and Helium in Certain SOV/20-126-1-44/6-2
Rocks and Minerals
method only in the case of samples which were first
investigated for the preservation of the radiogenic gases.
There are 3 figures and I Soviet reference.
ASSOCIATIONt Dagestanskiy filial Akademii nauk SSSR (Dagestan Branch of
the Academy of Sciences, USSR)
SUBMITTED: December 29, 195P
I
Card 3/3

AKMKMOT, Khabibula lbragimovich; BRAIMT. Sergey Borisovich;
BARTHITSKIY. Yevgeniy KHYZKKRO I.A., tekhn.red.
(Radiogenic argon in minerals and rocks] Radiogennyl argon v
mineralakh i gornykh porodakh. Prodisl.'D.I.Shcharbakova.
Makhachkala, Akad.nauk SM, Dagestanskii filial, 1960. 200 p.
(mma 14:4)
(Argon) (Radioargon dating)

LI FU [Li Plul; CHEN YU-3HI [Ghigng Yu-rhlibl; TU GON-MHI;
TUGARINOV, A.I.; ZYKOV, S-L; 6TUbiKOVAP H-L; POLEVAYAt
N.I.; BRANDT, S.B.
Asolute age of rocks in the Chinese People's Republic.
Geokhimiia n0-7:570-585 160. (MIRA 13:11)
(Ohina-Rocks-Age)

AMIRMITOV, .1h.I.; BRAMIR, -S.B.,; BARTNITSKIT, Ye.11.
R.K. Gerling's method of determining the aetivation enargy of
radiogenic gases in minerals. Gookhimiia no-7:646-649.-160.
(MIRA 13*:11)
(Argon) (Helium) (Diffusion)

S
S
/ 16 9/61/000/00 8/003/0 53
A006/A101
AUTHORS- Amirkhanov, Kh. I., Brandt, S. B., Baxtsyitskiy, Ye. N., Ourvich,
V. S., Gasanov, S. A.
TrkLE: On the problem'of pre"rvation of radiogenio argon in glaueonites
PERIODICAL: Referativnyy zhurnal, Geoflzika, no. 8, 196!', 4-5, ai-stract 8A37
("Tr, 6-y sessii Komis. po opredeltn1yu. a:Dsol-ratn. vozrasta geol.
formatsiy", 1957, Moscow, AN 3351, 1960, 202-207)
TW- The basio premise of using glauaonltas to determine the absolute
age by the K-argon method, is the similarity of Its st-'Untare with the milta
structure. The authors studied the dependen,~a ItNetween the quanti-!~y of radio-
genic argon liberated from glauconite and tha heating lamparabire within a range
of 100 - 1,500 0C. Argon was determined by the mathod of isotopic dilution.
The data obtained are compared with the know-n, K. K. 0Gerling curves showing
argon liberation from mica and miaroolines. At 100 C the glauoonite loses about
20% argon, whereas argon liberation from microoline and mus2crita begins at
400 and 6000C respectively. At 5000C, 100% 1 arpn are liberated from glauconite,
whereas 8 hour heating of microallne at 1,200 C an-tails only 76% argon loss.
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8/169/61/000/008/003/053
On-the problem of1preservation of radiogenic ... A000101
Debyegrams show that argon-losd oocurs prior to the beginnlng of destruotion of
the glauconite lattics~. The peaks on'the argon- litkrat.-Ina (St IDD and
5000C) .-coir-cide with- two endothermic efNc+.s o~L -_-s thex-mogram; --they
correspond to the separation of adserb,,.~d and Cona"IzWAon wat-3r. All this
indicates a weak-bonding of argon in the glauzonlt,!, lattR;e and requires a.
careful study of the geological history of each spacimen when Interpreting the
K-argon ages of glauoonite. The weak bonding of argon in glau"nite may possib-
ly be caused by small grain sizes (5 - _!OO/A,) off tLne laxter', siinee Processes of
ion and atoi6 loss and substitatimoccur m ataly a-a the or7s-'~%al surfaces,
V/
[Abstracter's note: Complete translationi
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