SCIENTIFIC ABSTRACT VLADIMIRSKIY, V.V. - VLADIMIRTSEV, A.P.

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• Collection: Scientific Abstracts
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• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

VLLDIMIRSXIT, V-V.; KOKO, Ye.G.; MINTS, A.L.; GOLIDIN, L.L.; KOSHXkW,
D.G.; MOYOSZON: N.A.; NIKITIN, S.Ta. -, RUBCHINSKIT, S.M.; SUCH-
NOT, S.V.; WULITSff, N.S.; TABASOV. Te.K.
Basic characteristics of the projected 50-60 Bev proton accelera-
tor with alternating-gradient focusing. Atom.energ. io.4:31-33
,56. OUBA 9 -.12)
(Particle accelerators) (Protons)

neutron

VLADDiIRSM, V. V. Ocad. Sci. , 1"Oscow.
"Interaction of Slow Eeutrons with Spherical and aongated Nuclei,"
paper presented Intl. Conference on the Neutron Interactions with the Nucleus,
9-13 Sept. 1957, Columbia Univ. New York.
The paper reports on the results of the work on calculation of slow neutron
in:~eraction with elongated nuclei, according to the cloudy vrystal model ofthe nucleus,
by V. V. VladLmirskly and K. L. Illin and interaction of slow neutrons with nuclei
(revievy) by V. V. Vladimirskiy, Radkovich, I. A., Sokolovskiy, V. V. arid Panov, A. A.
The solution of the problem ofthe notion of a neutron on a complex potential well
for an elongated nucleus has shown that the position and the shape of the giant
neutron absorption resonances with respect of atornic number changes appreciable in
the transition from spherical to elongated nuclei. This emables one to ex?-aaln
qualitati-vely the washed out character of the giant resonance near A = 156 without
recourse to an increase of the imaginary part of the complex potential. A quantita-
tive comparison between thear-j and experijrental data is unsuccessful.

nolmw -A. L.
YT~s,-:V. Y., XOMIAR, E. G., MINTS,
"Project of-a Proton Ring Aocelerator for 7 GeV "
paper presented ~t CERN SYMPosium, 1956, appearing in Nuclear'
Instruments, No. 1. pp. 21-30, 1957

GI)LD111, L. L,, DANILTSEV, E. N., KOSIW-RFV, D. G.
VPT
MMANI N. N.
"Deflection of the Beam of a 7 GeV Strong Focusing Proton
Accelerator," paper presented at CM Symposium, 1956, appearing
in Nuclear Instruments, No. 1, pp.-21-30p 1957

VLADMRSX1Y,,,V-..,7. ~ KOMAR, E. G., MIM, A. L.
"Main Characteristics of a Projected strong-focusIng 50-60
GeV Proton Accelerator," paper presented at CERN Symposium, 1956,
appearing in Nuclear Instruments, No. 1, pp. 21-30, 1957

JUTHORt SOKOLOVSKIY,V.V., YJADIMIRSKIX
A - 2256
'
E RADKEVICHqI.A.y PAUOV,A.A.
233
235
239
t
T
TITL
o al Cross-Secti of U
he Measuring of the to
, PU
, U
P
M
and of the Fission Cross-Sections of U
for resonance Neutrons.
(Izmereniye poinykh effektivnykh secheniy U2331 U2359 PU2399
a takzhe secheniya de len-,- F55 dlya rezonansnykh neytronov,
Russian)
PERIODICIL Ltomnais, Energiia, 1957, Vol 2, Nr 2, pp 129 - 139, (U-S-S-R-)
Received$ 3 / 1957 Revieweds 5 / 1957
ABSTRACTs Measuring was oarried oat by means of a neutron-speotrometer with
a resolving power of -0,1 - 0,2 microseo/m and 3 - 5 - 500 eV.
The parameters of the resonances were computed up to energies of
from 30 - 50 (with which the levels can still be regarded as re-
solvable). For these resonances the neutron widths r were de-
termined. The total widths r are sufficiently determined for those
strong levels for which errors committed in determining width
was not more than -50%. The authors try the statistical treatment
of the data obtained in order to compare them with the theory.
Next the method of dealing with results is discussed. The total
oross-sections were determined by measuring the transparence of
samples of different thicknesses. The fission cross-section of
Card 113 U235 was measured by meanD of a fission chamber which contains

233 235 PA -22256
The Measuring of the total Cross-Sections of U , U Pu 39,
and of the Fission Cross-Sections of U235 for resonance Neutrons.
- 280 mg U 235
Results 233 233-
The total cross-section of U Three samples of U oxide were
investigated, i.e. the samples Nr 2 and 3 at neutron-energies of
from 6 to 22 eV, the samples Nr 1, 2, and 3 at energies of from
18 to 450 eV- At energies of more than 20 eV noticeable errors
occur on the ocoasion of the determination of the number of levels.
The here computed resonance parameters are shown in a table.
The total oross-section of U 2353 Three samples of U 235_oxide were
examined, i.e. 2 samples at neutron energies of from 3,3 to 7 eV,
and all samples within the energy range of from 3,3 to 7 eV. At
energies of more than 20 eV a considerable number of levels is lost.
The authors found for both spin states of the composed nucleus
ii - 4 and 1 2 - 3 the average density W - 1,65 ;t 0,05 eV-1. The
parameters of the resonances of U 235 are shown in a table. Re-
ports on the 5Wion orose-seotion of U 235 and on the total cross-
Card 2/3 sectio .n of Pa are analogous.

PA - 2256
The Measuring of the total Cross-Sections of U233, U235, pu239,
and of the Fission Cross-Sections of U235 for resonance Neutrons.
Some Conclusionat The values of the reduced neutron width show
considerable variations for one and the same nucleus. The dis-
tribution of the neutron widths cannot be described
by a simple exponential law. Ihe distribution of levels in all
oases can be explained by accidental causes. An exception is
perhaps formed by pu239 where, with n - 4, the grouping.prohabili-
ty of the levels is 90 % (15 illustrations).
ASSOCIATIONs Not given.
PMENTED BYs
SUBUITTEDs 4-5-1956
AVAILLBLE# Library of Congress
Card3/3

v
L
v YJtr-X.Y.j KCWRp Je.G.; HIIXO A.L.; GOLIDIH, L.L.j KWKAR'-7V) Docq
,.W-,WM
MOMSZOHj N.A.; ITIKITIN, S.Ja.; RUBCIIISKIJ, S.M.; SKACKOVP S.V.;
STRELICOV., N.S.; TRASOV,, :e.K.,- MEDONOS, S., inz. (translator]
Main characteristics of the planned proton accelerator for 50-60
BeV energy with sharp focusing. Jaderna energie 3 no.2:56-57 F 157.

VIADIMIRSKIJP V.V. DCLg-dimirskiy' V.V. PAFOV,, A A.; RADKEVIC, I.A. [,Radkevich,
I.A.J; SOKOLDVSKIJ p vV.-[SkO klys V'V:1
Interaction of slow neutrons with nuclei, Jaderna energie 3 no.11:370-
384 N 157.

LUTHORSs Vladimirski V.P Panov, A.L., Radkevich, I.A., 89-11-7/9
Sokoloyakiy, V.V.
TITLE: The Interaction of Slow Feutrons with Nuclei.Review.( Vzaimodeyst-
viye meddlennykh neytronov a yadrami.Obzor)
PERIODICALI Atamnaya_ Eaergiya, 1957, Vol- 3, Nr 11, PP. 444-458 (USSR)
ABSTRACT: Everything known from more than loo Russian and foreign original
works on the interaction between slow neutrons and nuclei is short-
ly discussed here. The following items are discussed in particular:
Different velocity selectors.
Multichannel impulse analyzers.
Neutron spectrometers.
Comparison between the experimentally found and theoretically cal-
culated widths of the neutron resonance levels. Determination and
comparison of the level widths of the fission resonances.
The following data are given on large neutron meters at present in
operation in the USSRt
Site 6t L t/L Note
to M elelm-
a) crystal spectrometer
Pyrometric curved quartz
crystal
Laboratory 1 with the planes 134o)
(
and (10710)
Card 1/2 b) neutron selectors on accelerators

The Interaction of Slow Neutrons with Ruclei.Review.
Pyrometrie
Laboratory 2 16 o,12
c) mechanic4i interrupter
AVAILABLE:
Institute for
Atomic Energy 5 6,3 0,8
3,2 26,5 o,12
89-11-719
cyclotron
transverse rotor
longitudinal rotor
Pyrometric
Institute 1,3 19 0,07 transverse rotor.
There are 16 figures, 2 tables and log references, 3o of which are
Slavic.
Library of Congress.
Card 2/2

k]JTHCR IMIRSKIY, V.V. 56-4-23/52
TITU Mnan ~~mol~*#Dthe Fission of Heavy Nuclei.
(0 moknanizme deleniya tyazhelykh yader -Russian)
k~HIODIUAL znurnal isksperim.i. Teoret.Fiziki,l95'1,Vo1 32,Nr 4,PP IJ22-025 (ULO-b-H-)
Received 7/.L957 RevitnMd 011951
AMTRACT The present paper investigates tne influence exercised by tne individual
nucleons upon the shape of the nucleus before fission.The quantitative com-
parison of the computations of the droplet model with experimental data
meets with some difficulties,examplas are giveu.Further difficulties al-
so arise when explaining the observed asymmetry in the distribution of the
masses of the fragments.kany peculiarities of the fission process may oe
explained more easily,if stability is lost with respect to the asymmetric
deformations on the occasion of the expansion of the nucleus already be-
fore transition through the maximum of the energy of tne symmetric form.
Instead of one saddle point,two saddle points with an asymmetric configu-
ration of the nucleus are actually obtained.Horeby the inequality of tne
mass of the fragments can be explained in a natural manner.The delibera-
tions mentioned above make an ivestigation of the possible conditions for
tne occurrence of asymmetric saddle points seem actvisable,thoutn this fact
does not fit into ths classical notions of the droplet model.The explana-
tion of this effect discussed in the following is based upon the investi-
gation of the states ofthe individual nucleons within the deformed nucleus
in the sense of tne collective model and this explanation is of a qualita-
Cara 1/2 tive chargcter.Ths autnor here investigates only such states of deformation

un a 14achanism of the Fission of heavy Nuclei. 56-4-23/52
of the surface of the nucleus,in whicn the nucleus is axiglly symmetric
with respect to the axis OZ.1n tne case of an assumed expansion of tne
nucleus these states are energetically tne most favorable and are likely
to be the most easy way of attaining expansion energetically.For such asy-
mmetry of tne nucleus the wave functions of the free nucleons may be clas-
sified by the quantum number �L=lz+Bz(i.e.by tne projection of tne tot;L
angular momentum of the nucleon onto the axis of 9*=etry of the nucleus).
With, increasing expansion of the nucleus there follows a reconstruction of
the filling-up of the level of the nucleons with respect toSZ.The presen-
ce surplus nucleons with. high values of CLin a greatly expanded nucleon
most considerably diminish its stability witn respect to asymetric de-
formations.For symmetric deformations,nowever,the stability of the nucleus
is somewhat increased.
(No illustrations)
AbSOCIATION
PRt,SP;NTkW BI
oUBMITTY0 16.3-1956
AVAILABLY, Liorary of Congress
Gard 2/2

R Sn"
P W,
aw.
-VLADIMIRSKIY--V -V and SOKOLOVSKIY- V. V.
"Review of Pul#ed Neutron Sources and Neutron Monochromators."
paper to be presented at 2nd UN Intl. Conf. on the peaceful uses of Atomic
Energy, Geneva) 1 - 13 Sep 58.

VIADIMIRSM) V. V. and SMMCUMHMI) S. I.
"A Review of Some New Data on of Neutron Eff6itive Cross-Section and Fission
Process Investigations."
paper to be presented at the 2nd 01 Intl. Honf. on the peaceful uses of Atomt
Energy, Geneva, 1 - 13 Sep 58.

V V
30-58-4-20/44
AUTHORSs Baz' , A. I., CaAdida" Of. P14TiCal aZd MathgMatical, Science
Bszoilovi L.N.
TITLEs The Physics of Nuclear Reactions With Small and Medium Energies
(Fizika yadernykh reaktsiy pri malykh i srednikh energ:~akh)
Conference in Moscow (Konferentsiya v Moskva)
PERIODICALs Vestnik Akademii Nauk SSSR,1958, Nr 4,PP.97-102 (USSR)
ABSTRACTs This All Union conference took place in Moscow in November
1957. The program included all fundamental problems of
nuclear physics. A short survey on the transactions makes it
possible to understand the Iroblems facing nuclear phyBics
at present. One of the most interesting and most important
problems-is that of nuclear modelep i.e. which is the beat
way of model representation of nuclear properties. At present
these models develop into three main directions:
1) According to the shell model the nucleus can be repreented
as a self-coordinating potential in tEe__field of which nu-
cleons move.
2) The optical model is usually applied for the quantitative
Card 1/3 description of the neutron-proton-dispersion on the nuclei.

30-58-4-20/4 4c
The Physics of Nuclear Reactions With Small and Medium Energies - Conferen e
in Moscow
3) A great number of phenomena connected with the non-spheroid-
al form of equilibrium of the nuclei can be under--stood from
the viewpoint of the collective model.
The following reports were delivered:
1) P. B. Nemirovskiyt On results of the theoretical analysis
of the interaction of neutrons of small and medium ener-
gies with nuclei.
2) V. V. Vladimirskiy, Ye. V. Inopin, S. I. Drozdovt On prob-
fe-m a- of _t he- _o p-ta 'caT - m o d a 1 .
3) V. M. Agranovichg A. S. Davydove On theoretical foundations
of the nuclear models.
4) B. L. Birbrair, L. A. Slivks On the form of equilibrium of
the nucleus.
5) N. A. Vlasovx On excited states of the oe--particle.
6) F. L. Shapirot On the problem of the state 0
7) 1. 1. Levintovi On the radius determination of the X-part-
icle.
Card 2/3 8) Ye. K. Zavoyskiyt On the construction of accelerators.

30-58-4-20/44
The Physics of Nuclear Reactions With Small and Medium Energies. Conference
in Moscow
9) G. Barshall(USA)i On the investigation of polarization
phenomena.
10) Yu. A. Aleksandrovs On the electromagnetic interaction of
fast neutrons and nuclei.
11)G. N. Flerov: On works of his group concerning nuclear re-
actions.
12)A. 1. Alikhanovi On measurements of the polarization of
electrons forming during A-decay.
lo Nuclear physics-USM
Card 3/3

AMHORS: VjLt~~~~nov, A. A., SOV/89-5-1-8/28
-kidkevich, I. A.j, Sokolovskiy, V. V.
TITLE: Measurement of the Fission Cross Section of u233 and of the Total
Cross Section of Arsenio, Vanadium, Tantalum, and Bismuth
(Izmereniye secheniya deleniya U-233 i polnykh effektiv-aykh
secheniy myshlyaka, vanadiya, tantala i. vismuta)
PERIODICAL: Atmalaya energiya, 1958, Vol. 5, fir I , pp. 69-70 (USSR)
ABSTRACT: Cross sections vere measured by means of a neutror spectrometer
vrith mechanical selector (as described by reference
1.) Resownce parameter of U233.
E03 ev 1,47 1 1,78 2,?31 3,6 4,5 6,8 110,4 1 12s7 1 15,4 +)
~-o
5
58t4
13t6
4,()+-1,5
8
73+
135t12
103t8
4 ++
41+
in b.eV I - _
C
d 1 .
ar
/ 3

Measurement of the Fission Cross Section of U233 and of SOV/89-5-1-8/2-8
the Total Cross Section of Arsenio, Vanadium, Tantalum,
and Bismuth
ff- 260+13D 330+200
- 57+30
in mV
+) 1611, 19,0
++) 96�15 90+9
... )75+50 05+-40
2.~ No resonance vras found in vanadium between 10 and 100 eV.
3. The resonance in tantalum at 35 and 39 eV is not a doublet
but only I level at 35 eV.
4.) In bismuth resonances were found at 800, 2300, and possibly
also at 3100 eV. The following parameters were calculated
for the 800 eV resonance: F= 10 +- 3 eV, 1,r = 7 � 5 ev,
In = 3 j 2 eV. There are 2 tables and 10 references, 5 of
which are Soviet.
SUBMITTED: July 25, 1957
Card 213

Measurement of the Fission Cross Section of u233 and of SOV/89-5-1-8/28
the Total Cross Section of Arsenic, Vanadium, Tantalum,
and Bismuth
1. Uranium--Fission 2. Arsenic--Properties 3. Vanadium--Propertiew
4, Tantalum--Properties 6. Bismuth--Properties 6. Neutron cross section
--Measurement
Card 313

VLADIMIRSKIT, V.V.; KOSHKAREV, D.G.
Achromatic magnetic turning system. Pribo i tekh. eksp. no.6:46
11-D 15 S. (MIRA 12:1)
(Particle accelerators)

Lh i
)LLAD32-11RSP)~_j_Y,Y. and ILIINA, I.L.
USSR Academy of Sciences, Moncow
"Qptical Model Calculations of the Interaction of Slaw Neutr ns with
,P
Prolate Nuclei," Nuclear Physics, Vol. 6, No. 2, pp. 295-304,%~950-
(North Holland Publishing Co., Amsterdam)
Abst: The cross sections for absorption and scattering of slow neutrons by non-
spherical ellipsoidal nuclei are calculated on the basis of the optical model.
Diffuseness of the nuclear boundary and rotation of the nucleus are neglected,
The results obtained allow us to explain the great width of the giant resonance
in the region A 150. It is shown that in the case of prolate nuclei the min
resonances are accompanied by additional maxima.

7(5)' 7(6) SOV156-3-51-2- 59/6o
AUTHOR: Vladimirskiy, V. V~
TITLE. On the Optical Methods for the Observation of Ionization in
the Tracks of Fast Particles (Ob opticheskikh metodakh
nablyuden-Lya ionizataii v sledakh bystrykh chastits)
PERIODICAL: Zhurnal eksperimental7noy i teoretichoskoy fiziki. '958:
Vol 35, Nr 218); PP 556-5r-7 (USSR)
ABSTRACT: It is possible to prove the following facts: If the atoms and
iona in the traoks of the ionizip-r- partialea are exposed to
resonance light, the number of the scattered quanta is bv
far higher than lie number of the quanta which .1F; found by
the immediate recording of 'lip scintillaticna !,a a Gas. This
permits the observatior, of the particle tracks withr.,ut the
condensation of vapors on ions.- It is theoretic-ally possible
optically to record ions and also neutral atoms in ilie trac-ks
of the nartiolea, But in the recording of noutra-1 atoms thnre
arise difficf-iltia3 which are ca-used by the extinn-tion cf the
resonance fluorescerce by the m~jleculea of 'he -Lnitiai .-~as~
Card 113 Therefore the use of lons is more adirazitageous,, The author

SOV156 3c 2-59/6o
O~ the Optical Methods for ;h,~ Observaticn. of Ionization in the Tracka r--f
Fast Partioles
first estimates the intensity of the light scattered by an
ion., An expression is given for the cross sect.-Lor- of tile
scattering for a dipole transition in the maximum of tle
resonance line, The C-reater part of the. suitable trarsizi-oas
belon,~s -to the double'-o2 2 2 2
1112
Expreasicns az-9 eiven for the maximum flux of the quall-ta
of bct-h polarizations from the 1).ght soaro~e into a unit of
the nolid angle and for the genera) number of the scattered
quanta,, ThG observation time is i1imited by the dillfusioL, of
the ions and may be chosen within the iz-,ter-al 0 0' - 0 sack
AccordiriC to the above nerit-oned formula, P- rjinjn,~-
ion --2.~03 quarita. Such. a Iii3ht quant.-Lity may be
corded by means of an electron optical conveiter. An -immediate
photographic recording is possible, probably,. for the tracks
of the strongly ionizing particles. The sinrly charged ior.2
of 111g, Ca.. Sr., Ba, Cd, Zn, Pb have suitable resonance lines
in thelvisibie and in the near ultravi-31-et part of the spe..
trum. A combination of one of tha above-mentioned metals with
Card 2/3 an inert gas seems to be very advantageous, The ions ,f Ca

911,
30V/515~35-2-5
On the Optical Methods for the Obnervation of Ionization iln rne 7rack;i r,'L'
Fast Particles
Sr, Ba have metastable states and may be used for the obtain,
in-- of a resonance combination scattering. Hitherto has not
been possible to decide whether the above discu33ed Method
is more advantageous than the hitherto known methods or not.
The author thanks I. S. Abramson for useful advice~ There.
are 5 references. 4 of which are Soviet.
SUBMITTED: June 9, 1958
Card 3/3

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21M 110V/556-36-4-56/70
AUTH01IS: Trebukhovskiy, Yu. V , Yladirnirokiy, V, V., Grigrarlyev, V. K.,
Yergakov, V. A.
TITLE: The o-)-Angular Correlation in the P-Decay of the Free Neutron
(Uglovaya korrelyatoiya e- pri 0-ruspade avobodnogo neytrona)
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy f-iziki, 1950j, Vol 36,
Nr 4, PP 1314-1-1416 (USSR)
ABSTRACT: In the present "Letter to the Editor" the authors report about a
method of determining the electron-neutrino angular correlation
in the P-decay of the free neutron; this method is carried out
by spectrum analysis of the decay electrons with fixed momentum
of the recoil protons~ The experimental arrangement is echemat-
ically represented by figure 1. The collimated neutron beam
(diameter 35 mm) used for th-is investigation was obtained fzom
the heavy water reactor of the AS USSR. The neutron beam Inc'sdes
direct on to a lead- and boron-,arbide-shielded monitor by which
flux is controlled, The electrons are conveyed v.1a magnetic
lenses to a Geiger-MUller counter, and eventually reach a photo-
multiplier; the recoil protons encounter an electronic multi-
Card 1/3 plier. Work was carried out with double coincidence connection

SOV/56-36-4-56/70
The e-V-Angular Correlation in the P-Decay of the Free Neutron
(for the purpose of eliminating such electrons as had penetrated
both detectors) and with triple coincidence connection (between
the proton- and electron detectors), The former had a time re-
solution of 0.2 Osee and the latter of 0 '1 Meec. During measure-
ments, the results of which are shown by a diagram Jn figure 2,
the effectivity of the electronic multiplier was checked by
calibration with an a-source and that. of the Geiger-Miiller count,
er and the photomultiplier by means of an Sr9o-eov,~-e, Figure
ahowa the calculated curves for 5 'K-values between - * and - ,
The measured values (which are also plotted) have a standard er-
ror. Dealing with the results according to the method of the
smallest squares gave ),-= -0,,06 � O~13, by which only the pta-
tistical error is taken into &,zcount. The value de-iates some-
what from that obtained by Robson (Ref 3) -'-0 07 t D 12)
Proceeding from the assumption that 3.n P-decay fl'.'e, main cont,.i-
bution is made by the axially-vectorial and the 7ectori.al vari-
ant (of Refs 4-7), it holds, in accordance with theX_-value of
the authors, that R - 2 2 +1,5 The authors fl,nally
gj/ 9V = 1~3_0-53'
Card 2/3 thank Academician A.. I.. Alikhanov for his advice, Ye. K, Ta-rasov

SOY/56-36-4-.56/70
The e-.)-Angular correlation in the P-Decay of the Free Neutron
for calculations, and D. P. Zharkov, G. K. Tumanov, and N. I.
Afanaslyev for their help in carrying out the experiments;
they further thank V. Ye. Nesterov for assisting in construct-
ing the experimental set-up, and they thank chief engineer of
the heavy-water reactor, S. A. Gavrilov, and his collaborators
for keeping the reactor in permanent operation. There are
2 figures and 8 references, 4 of which are Soviet.
SUBMITTED; December 25, 1958
Card 3/3

VLADIMIRSKIr, T.T.; HIKITIN, S.Ya.
InternatlovAl conference on high-enerS7 accelerators and
devices. Prib.i tekh.eksp. no.1:147-150 JeAf 160o
(MIRA 13W
(Particle accelerators) (Gloud obambers)

8443h
Af 0 5/056/60/039/004/032/048
~14100 B006/BO63
AUTHOR: Vladimirskiy, V. V.
TITLEt annels, and Bottles for Cold Neutrons
PERIODICAM Zhurnal eksperimentallnoy I teoreticheskoy fiziki, 1960,
Vol. 39, No. 4(10)1 pp. 1062 - 1070
TEXT: The fact that neutrons whose spins are orientated in the magnetic
field direction are reflected by regions of high field strengths is used
to focus polarized neutron beams by means of magnetic mirrors and
channels. In the present paper, the author discusses several problems
related to neutron storage. The cold neutrons can be confined by
restricting the vacuum cavity by magnetic mirrors. First, the author
studies the adiabaticity conditions that are necessary for maintaining
the spin orientation relative to the field. Section 3 deals with possible
magnetic field configurations:(a plane magnetic mirror (Fig. 1), a
cylindrical, focusing channel Fig. 2), arrangement of poles on equi-
distant circles (Fig. 3), and an arrangement of poles on a helical line
(Fig. 4). The advantages nnO. of the. vario',13 conf J. -nrat ions
Card 1/3

8hhlh
Magnetic Mirrors, Channels, and Bottles for 5/056/60/039/004/0-12/048
Cold Neutrons B006/BO63
are discussed. Section 4 gives an estimate of the intensities of pola-
rized neutron beams. By using magnetic channels, it is possible to form
beams of cold, polarized neutrons having energies from 10-4 to 10-3 ev.
Section 5 deals with neutron storage and neutron densities in magnetic
bottles. The neutron fdensities may be estimated from the formula
n - (2n 0/36)('~&H/9)W' where n. is the thermal neutron density on the
reactor boundary, and 0 the neutron temperature. The cold neutrons on the
surface of the reactor are assumed to have an ordinary thermal spectrum.
In fact, however, the number of cold neutrons is somewhat smaller on
account of absorption. The correction factor is approximately equal to
or0/(a0+(1 a), where aadenotes the absorption cross section, and 60 the
cross section for the energy exchange between neutron and moderator. For
a reactor with a thermal neutron density of 108/cm3, it is found that th!~
neutron density in a magnetic bottle is n^,104/m3. When using the cryogei~
technique inside the reactor it is not possible to increase n by more
than one order of magnitude. Finally, the author discusses the possibility
Card 2/3

84431
Magnetic Mirrors, Channels, and Bottleo S/056/60/039/004/032/048
for Cold Neutrons B006/BO63
of placing a magnetic bottle over the reactor and of using a vertical
hole as a neutron source. Problems concerning the potential barrier and
neutron heating as dependent on the selection of the bottle walls are
also discussed. V. K. Gridorlyev is mentioned. There are 6 figures and
5 references3 2 Sovie , 2 US, and 1 Swiss.
SUBMITTEDt may 13, 196o
Card 3/3

VLOIKIRSKIY., V.Vf. GORIIEV., V.K.; IEERGAKOV, V.A.; ZHARKOV, D.P.;
--TIMUMOVSKIIJ, rUOVO
Electron,.neutrino angular correlation in free neutron decay.
1xv. Ail SSM. Sere fize 25 no.9:3.321-1123 161.(14IRA 14:9)
Neutrcas-Decay)
utrinoe~
M
(Electrons)

3C036
3/030/61/000/011/003/007
B105/B147
AUTffORS-. Doctor of Physics and Mathematics,
Galldin, L. L., Doctor of Physics and Mathematics
TITLE- A new powerful proton synchrotron
PERIODICAL: Akademiya nauk SSSR. Vestnik Ao. 11, 1961, 34-39
TEXT: A new large 7-10 9 ev proton synchrotron was put into operation at
the Institut teoreticheskoy i ekaperimentallnoy fiziki Akademii nauk SSSR
(Institute of Theoretical and Experimental Fhysics of the Academy of
Sciences USSR). The principle of strong focusing makes it possible to
build lighter, cheaper machines of higher efficiency with equal maximum
acceleration. Fig. I shows the cross section of the vacuum chamber and
the poles of the electromagnet; the chamber is much smaller than that of
the accelerator at Dubna. The magnetic field of the required shape is
obtained between two hyperbolic poles and the neutral pole, The poles of
the electromagnet correspond to xY =50.5 cm2 and are machined to an
accuracy of 0.05 mm. The magnetic ring, 80 m in diameter, consists of
112 magnetic blocks weighing 35 tons each; they are arranged with an
Card 1/4

S/030/61/000,/011/003./007
A new powerful proton synchrotron B105/B147
accuracy of 0.1 mm. The field in the center of the chamber amounts to
,j8500 oe. Fig. 3 shows the plan of the accelerator building, A proton
beam electrostatically accelerated up to about 4 Mev is injected into the
ring, accelerated to 7-10 9 ev, and finally conducted through the exit
channels into the experimenting rooms, the largest of which in 100 m long
and 42 m wide. They are separated from the magnet room by 10 or 6 m thick
detachable concrete walls. According to its energy, this accelerator is
the fourth largest in the world and the second largest in the USSR, after
that at the Ob"yedinennyy institut yadernykh issledovaniy (Joint Ins!.itute
of Nuclear Research) at Dubna (1010 ev). The experience gained during the
construction of this accelerator is to be utilized for the construction of
a 60-70 billion ev accelerator. The energy of accelerated protons reached
7.3-109 ev in October 1961, and thus surpassed the energy planned The
intensity of the beam is to be further increased, There are 4 figures,
Card 2/f

IQUA
Zs/i2o/62/000/003/GG5/048
E039/E133
AUTINORS: Kalebin, S.M., arid Vladimirskiy, V.V.
TJTLC: A machanical noutron chopper suspended in a magnetic
fiold
OD I CAL: Fribory i takhailka ol~spcrimunta, no.3, 1962, 6 4
1 3 - 3
T!.;:' T; Tne apparatus is described in detail. Tbe rotur,,
*1 i c; -1 jl,e-j~j;jjs ?-5 jcZ, is -juspended in a maLnetic field and rotates
a6out a vertical a~zis. All aspects of tlie stability of the system
are dizzilssed a,-id it is shovrn that dampinfr, in the horizontal plane
is reauired. Tl~e rotor is maintained in space with no mechanical
contact to an accuracy - 0.01 sim in rotational stability and is
driven by an asynchronous motor on the same axi.;. o vertical
oscillation is obse.-ved. -aith a~ microscope (50-X). A detailed
description of the vertical and horizontal stabilizing circuits
is also given. In the rotor are ti-,,o slit systems, 13 in each,
symmie tri c ally placed with rosrect to a diameter of the rotor.
At the exit the slit width is 0.4 mm, at the centre 0.6 mm, 'and
the height is 15 mm. The camber of the slit at one wall is 0.2 mm
and the other 0.4 nun. With this arrangement two neutron pulses
Card 1/2

A mechanical neutron chopper ... S/12o/62/000/003/005/048
E039/B135
per revolution are obtained. At 15 x 103 rov/min the transmission
spectrum passes through a maxiinum at -20 ev. Using thick
sa.'MICS Of CO, 11, and Ta, it iL, shown that the background is -15'IJ'
for a fli ht base of 5:0 m. Theoretical analysis sjiows that the
forw of the transmitted noutron pulse approximatos closely to a
trianc-le, the half width of which dofines the limiting resolution
of t'ac~ chopper. A CHI"1-5 (SNTM-5) boron counter is used at a
pressure of 600 mir, Experimental and theoretical curves are
compared for Tal8l (38-8 ev) at 15 x 103 rev/min and good agree-
,;Ieilt is obtained. It is concluded that, with the aid of this
chopper, it is possible to obtain neutron pulses having a half
width - 0.5 lisec. There are 12 figures.
ASSOCIATION: Insti-tut eksperif-sentallnoy i teoreticheskoy fiziRi
AN SSSR, (institute of Experimental and Theoretical
Physics, AS USSR)
SUBIMITTED: -November 25, 1961
Card 2/2

h07hh
S/12o/62/O0o/oo4/olo/o47
B032/E514
31