SCIENTIFIC ABSTRACT ROZMAN, I.M. - ROZMAN, S.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001445720012-5
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: September 19, 2001
• Sequence Number: 12
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

SOV/120-59-2-16/50
A Multi-Frequency Phase.Fluorometer with Double Frequency-Changing
described previously (Re.f '11) has been extended by adding
units to perform~phase measurements at 8 .12, 15 and 20
-Mcls. Fig 1 showsthe~block diagram. ~The~mixer, 1)~';
receives frequencies fl. and f2 from a quartz
oscillator and from a,GS,S-6 signal,generator. :A resonant
circuit selects the~b,eat frequency Fl Sl - f,-,) and feeds
it to an electron-beam modulator. The' mixer, 2,
receives the frequency Fl from the ph6tomultiplier
(which detects the fluorescence), and f2 from the GSS-6.
A resonant circuit selects the frequency F2 = Fl+f2 fl.
Thus the double frequency-3hanging enables one
.to make phase measurements at a fixed frequency of
20 Me/s, whereas the beam.is modulated at frequency Fl.
Now F.1 differs greatly from fl and f2,1 and so.the,
various frequencies can be separated very thoroughly by
the filters. . The frequency fl (20 Me/s)-is.stable
(quartz oscillator), sothe main ca,uses~of phase drift
nstability in 'he GSS-6~and instabilities
are frequency ir U
in the resonant circuits, in the electron beam, and in.the
Card 3/6 photomultiplier (an FEU-25). Under the most unfavourable
cond�tions, with Fl< -P- ~modulation frequency 8 Mc/s),
A- 2

SOV/120-59-2-16/50
A Rulti-Frequency Phase Fluoromete-. with'Double Frequency-Changing
when Af2/F1 >,&f2/f2 -the zero drift is
about,0.59/min.
An 8-positicn.sample-holder is used to.change.the:sample
and check the zero.reading quickly. Numerous measure-
ments made with the instrument indicate that the root-~
mean-square er:,.-o-- is about 10, Fi g 2 alve's som Ie r.esu lts
for plastic phosphors, (Ref 12) . The fluorescent
additives were excited by the light produced in a separate
polystyrene disc 0~ = '110 m)l) , which was excited by a
modulated beam of 30 10V ele-trons. The plastic phosphors
containing tetraphenylbutad
Jene and triphenylpyrazoline
showed no dependence of -rf, on frequency, within the
experimental er-or. CaL~ullations show that -r _. should
L
fall uni-IL"o.-mly with frequency if the decay consists of
two components, both exponential but with different values
of The anthracene content of 10-2- g/g (Fig 2
curve 4~ gives 2.*7xlO-9 sec and 'r 1C~10~'-~ sec.
Anthracene in benzene ~ gives. the same value of -T
(Ref 13);-e2 relates to anthracene bound to polystyrenes
(ReflLO. The phase difference between the modulated
Card 4/6 electron beam and the,fluorescence has to be measu redin
this method; the two signals Are of different physical.

SOV/120-59-2-16/5o
A Multi-Frequency Phase Fluorometer with Double Frequency-Changing
types. There are several ways of.making the measurement
(Refs 11,15). If we use several different frequencies
to measure the:phase difference between two different.
values ofr , we can,draw up enough equations to determine
T -e2 , and to eliminate the unknown initial phase of
i, and,
the electron beam. .,,Measurements made with several pairs
of phosphors show that~it is impossible to get agreement
between.the value Is of,-tl and .-r2 for all combinations of
the frequencies (any two frequencies suffice to give
and'r2 , so the number .of combinations-is .6). Hence"Ithe
decay laws are.not exponential. ~~The results for
polystyrene (which'is the.basis of the most.plastic
phosphors) can be explained if wessuppose that'someof
the excited molecules interact with one another7 i.e.
that bimolecular processes occur. We would get the
reverse dependence of yf on frequency~if we were to
assume primary photons present. Some more detailed
aspects of this topic will form the subject of a separate
paper.
This is a complete translation apart from Fig 1.
Card 5/6 There are 2 figures and 15 references7 of which

24(7)
AUTHORS: Rozman, I. Andreyeshchev, Ye. A., Kilin, S. P.
TITLE: On the Nechanis- nf the Luminescence of Plastic
Scintillatori.(O maMianizme lyuminest sent sii plastmassovykh
stsintillyatorov)
PERIODICAL: Izvestiya Akademii nauk SSSR. Seriya fizicheckaya, 1959,
Vol 23, 1fr 1, Dp 1a2 1o7 (USSR)
-II.BSTRACT: The energy yield of. scintillation in organic luminescent
scintillators is much lower than that-of luminesc-ence.
This fact gave rise to various different.hypothes'es in:,
publicat'
ions as to the luminescence mechanism of these
substances. One of the hypotheses mentioned (Ref's 13,14,
-15,16), according to which a bimolecular extinction process.
is responsible for the low energy yield.of the scintilla-
tion. of organic substances, is not in'.contradiction to
the experimental results'obtained.in this paper. The
luminescence energy yield for plastic scintillatorsiwas
detcrmin6d on. the basis of polystyrene, with an~ addition
of 0-015 91g 10 ,4,4, tetraphenyl-1 37butadierie for, the
.
'Card 1/3 .
case of excitation ~of the C06o r7ith y-ra s. The ~device
Y,

On the echanism of the Luminescence of Plactic SOV/48-2.3-lr22/36
Scintillators
used for measuring the luminescence intensity is
illustrated by a fi~,qire. The dependence of the luminescence
yield ~ /D (D = y-radiation dose) on the shape and size~l
ofthe scintillator (sphere and cylinder) is shown by.a
table. VVith a reduction of dimensions the yield increases
slightly. For the zero mass of the sample a luminescence
yield of 0.038 was found (by means of extrapolation), and
the specific amount of scintillation was determined as
amounting to
B
14 photons/kev. For the purpose of investigating
the extinction of polystyrene luminescence,.the "fluoro7-
metric time" 't was determined (Table 2). For the modulation
frequency it holds that
/t~ rj 10 sec. This is indicative of ~a
fl (JN
bimolecular, process.. From these deliberations it, follovis
that an additional extinction occurs with'a rate of
Ca--d 2/3

On the Mechanism of the Luminescence of Plastic
Scintillators
10 1
lo sec- but that,the specific amount of scintilla-
tion is only 5 times smaller than if there were no
additional scintillation. There are two possibilities
for agreement between these facts: a) a certain' part of
the primary activations is very rqDidly,extin-uished at
the expense of "non-active" absorption or at expense of
the local increase of temaerature (temperature eXt4nction.
of fluorescence and scintillation of polystyrene coincide),
or b) a bimolecular extinction of part of the primary,
activations is assumed. (calculation and table of results
are friven). There are 2 figures, 3 tables, and 24 refer--
ences, 10 of which are'Soviet.
Card 3/3

2100), 7(5) SOV/53-69-~-4/6
;WTHORS: Rozman, I. M., Kilin, S. P.
of
TITLE: Luminescence/P-Iastics Scintillators
P-ERIODICAL: Uspekhi fizicheskikh nauk, 1,959, Vol.69, lir 37 PP 459-482 (USSR)
AB'---T?,kCT: The present article gives a systematic account of the data
hitherto known concerning plastics scintillators; with respect
to other surveys dealingwith this field reference ismade to
monographs (Refs 1-~), to surveys (Refs 477) and to reference 5,
which gives a survey of,experimental methods.of.investigating
scintillator properties. The scintillators,are subdivided into
3 classes:~anorganic crystals.,,,organic'substances, and noble
`g
gases. Among the orp t i c s (aO*#w
alnic substances, plas .,polystyrene,
polyvinyltoluene) are..charac.terize,d by~th.eir, great.light.emis-'
sion. The.average duration of.scintillation is between
10-9 and 10- 8 sec i they are well suited,as "fast" detectors of
ionizing particles; theyare mechanically solid, not,hygroscop-
ic, and may also be used in a va-cuum and within large tempera-
ture intervals. In chapter 2 the production methods are briefly

'Card 1/4 discussed (catalytic polymerization and thermal polymerization)

A
L"
"

Of
Luminescence/flastics Scintillators ~SOV/53-69-3-14/6~
Chapter 3 discusses the lumines.cence,characteriaties. The most
important are time- andenergy resolving power.. The former de-
pends.on the time-dependent distribution of luminescence
photons inciding upon the photoelectronic multiplier, the lat-,
ter on the energy absorbed:per Dhotoelec.tron in -the scintilla-
tor. The same importance must be.attached to:11proportionality"
(between absorbed energy and impulse in the multiplier). The
properties of,a scintillation counter depend e.ssentially on the
luminescence yield,.,,the luminescence spectrum, and the duration
of scintillation. The luminescence characteristics, however,
depend, besides,on the nature of the.matter, also on dimensions
and the light collection conditions.. The.external (calculatory)
charact6risticsimay,differ essentially,from.the internal,
(physical).ones of.a.scintillator. In. the following.the lumines-
re briefly discussed on*the basis of two diagrams
cence spectra a
and one table, and in the next chapter,the luminescence yield
(ratio.between the entire luminescence energy and the absorbed
excitation energy) and the specific amount of the scintillation
(n~umber'of photons per absorbed excitation energy unit) are dealt
with.:Several,simple'relations are given and the respective
Card 2/4 chaia.icteristics,of-var.ious scintillators'are discussed on the,
Vol

of
'Luminescence/-Plastics Scintillators SOV/53-69'-3-4 6
basis of tables. In the next chapter the duration of lumines-
cence and the form:of the scintillators areldiscussed (2,dia-.
grams, 2.tables). In chapter 4-the scintillation mechanism is
dealt with. The phases are discussed on.the basis of.the:
example of radioluminescence: 1) stopping of the charged
particle, excitation of the molecule..2) All processes up to,
charge-.and'e'nergy loss. Some- roblems.connected herewith are
p
discussed as.e.g..excitation.and ionization. Several problems.
of absolute.lumineseence yield are discussed in the next
chapter. In the.optimum case a specific scintillation magnitude
s 9/Eo photons/ ev is obtained, a value which is
max
practically not attained; for 1 Mev electrons in anthracene
0.03. Galanin and Grishin (Ref 44) tried to deriTe this
ratio for fast electrons theoretically they obtained
s(1 0.006-In the following the interaction of activated
ecules among one.another is discussed together with some
further-theoretical ahd experimental investigations (Rozman,
Galanin, Prosin, Kilin)..The next chapter.deals with th6 degree
of,efficiency of, theexcitation energy transfer in plastics
Ca rd '3/4 scintillators,landschapter 5deals with some. examples of the

86732
S-~2 0 0 0 2,?j Ilt
E032/)93i4
,:AUTHORS: Viktorov,,D.,V.', Kilin, S.F. and Rozman. I M.
TITLE: On the Linearity of a Counter wi-th:a.Plastic
Scintillator
PERIODICAL: Pribory 1 tekhnika.,eksperimenta, 1960, No. 6,
pp. 27 - 30
TEXT: A study is reported of th e dependence of the amplitude
of the 46intillations.on the electron and (x-particle
.energies in polystyrene and polyvinyl toluene-based plastic,
sIcinti-llators. These plastics are designated rIC-1 (PS-1) and
nC-2- (PS-2). Preliminary results by Boreli and Grimeland
(Ref. 3) indicated that these.scintillators give alinear
output.fo ,r,electro n energies between 0.4 and 1~,'MeV.~. The,
present authors have investigatedtheresponse of these
.plastics to electrons with energies between 2b and 8oo keV;.
A Compton spectr ometerAFig. 1),was used to detei7mine the..
energies. y-rays were .allowed to fall on'the plasti-:~ under
"Investigation. Coincidences were.recorded between~pulses,
produced in the plasticand.the pulses due to Compton,scattered
y-rays produced-in a second scinfillation counter, using
'Card 1/3

86732
S/12o/6o/ooo/oo6/oo6/o45,'
E032/E314
on the Linearity of a Counter with a,,Plastic S:--intillator
,sodium-iodide crystals. The plastic scIntIllators were
...28 mm in diameter and 25 mmlong. They.were 3-n,good,.optical
contact with an.gl)'/-710:~(FEU-210):photomultiplier and were.
provided with a.MgO reflector.. In order to reduce background
random~coincidences~ the y-ray.source.was carefully.screened..,~
~with lead. The resolving time, of the coincidence circuit was
-7
.5 X, 10 sde and provisionwas made for discrimination
against pulses in the cou nting channel of the s od 1.um-lodi-de
crystals. Fig. 2 shows spectra obtained wi-ththe. PS-2
,plastic. The cux-ve on the left corresponds to Y.-rays of,.
80keV and a Compton,angle.of, 155 deg. The curve on,the
right corresponds to Y-rays.of 662,keV at a Compton angle
of 117 deg. Fig. 3.shows that the mean amplitude of pulses
from the PS-2 plasticAs strictly proportionalto theenergy:.
of the incident.electrons.in -the range,10 - 1 000 keV.
Flg.~ 4 shows a similair plot for the PS-1 plastic and again
the amplitude-energy relatilon is linear. In the latter,case
~the rangecovered is 400.t0 -.800 keV. A study was also
Card,2/3

867j2
s/i?.o/60/000/0O6/oo6/o45
E032/E314
On the Linearity of a Counter wi-~th a.Plastic Scintillator
~o.6 and 4.8 MeV.
made,of a-particles with energies between
Using a single-channel pulse-height analyser, a plot
was made of the mean amplitude of the.scintillations v-%.the
energy of the (x-particles..: Here, the amplitude--~energy
relation Is no longer linear. .' The results obtained are
shown, in Fig. 5, in which Cur ve 1refers to:the.:PS-2 plastic
.and Curve 2 gives the residual range of,(x-particles as a
function of energy. It was found that the amplitude7energy:
relation is'the same for-both,ps-i and PS-2. The average
amplitude of the scintillations was found-to beta linear.,
function of the residual range for.energies between,-- 1 and
3 MeV.
There are 5 figures, I table and 8 references: 4 English,
2 Italian and 2 Soviet; one of the Soviet references is
translated from English.
SUBMITTED: October 31, 1959
~Card 3/3

?10
AUTHO
TI TUE
PERIODICAL-
AES MICT-.
68330
-V/51-8-l-737/40.
Kulakova, A,F, and Rozman, I.M.
-----------------
Temperature Quenching; in Certain OF&-anic Scintillators
Optika i spelctrosicaplya, 1960, Vol.8, Nr 1, pp 140-1142 (USSR)
M.D. Galanin (Ref 5) has put f orvva rd an explanation of.the much lower
radioluminescenca yield Jkiaf Ot-particlea , compared with.the yield
obtai Ined by /3-ray bombardment_(-?6/%S-0-l). Galanin suggested thatip
the radioluminescence Iyield of ok-particles is low because of very strong
t'*ons of the ek-particle tracks' He
quenching in the central por i
ascribed this very strong quenchin'6 to very high -local tempiIeratures
produced by the paagage of I heavy m-particlos; Galanin assumed that
outiAde tho central portIonc of the tracks temperature falls very
rapidly and that practically Ull 0,-lwilnes conce iu preAuced in the
outer portions of the true". To check the main promisea of Galanin's
theory the present author. investigated the temperature dependence (f
:the luminescence Yi6ld of dibanzyl and stilbano excited with.CJ414-PrI44
P-particles and with P0210
ck-particles 'The ins tru~ment used is.shown
schematically In Fig 1. Its main parts were a.phAomultiplier FEU-291(l),
a source of o.- or P-rayA (8), a thermocouple (9) and a furnace (10).

68330
sov/�1-8-1-37/40
Tanpei-Atura Quenchin- in Cartain.Orgunic 8 cintillators
A sample was placed in a container (6). On top of -thesample there
ns an opaqud alwiiinium foil which prevented.the light produced by
excitation of air,above the swaple from reaching the photanultiplier.
The results obtained (ng ~) shoyled that on m elti ng of both crysta is
there was a sharp.fall of both ck-.and p-luminescence yields. Similar
behaviour was earlier reported. by Herforth and Kallman (Ref 6) for
naphthalene diphenyl and phenanthrene. In the case of stilbene
excited -with tL-particles the; luminescence yield fellby a factor of
ti g.- -excitation the measured lumi
,1000 on mal n ' In the cas a of /1. nes6ence
yield after melting 'was high because of the Cherenkov,radiation
accompanying P -rays. ' This r. hows that the. temperatur Ia dependence of
the luminescence yields of.. stilbene and dibenzyl agrees with Galanin's
theoty i.e. that a rise of 10000 above room t,lemparature may produce
an almost complete quenching of luminesceace. Moreover the second
assumption made by Galanin in his theory, i.e..that the yield falls
very sharply (in a ve.ry narrow range of temperatures), is abao satisfied
in the case of stilbene and dibenzyl. The.authors Point out, however,
tbat Galanin's theory is not universally applicables many organic
substances with low melting point luminesce quits strongly when in
Card 2/'

'08330
-soil/51-8-1-37/40
Temporature quenching in Certain Organic Scintillators
liquid state. This happens in the case of toluene, xylene, styrene
benzene, etc. To illustrabe these departures from Galanin's theory
the authors show in Fi,- 3 the results of their measurGments, on PolyTinyl
toluene- on raelting of this substance there is no sharp.fall,of the,
luminescence yield, It folloWs that the temperature quenching due to
local heating in the path of an ionizing particle cannot be.the only
or the most iinDcrtant cause'of dependence of the ra.,dioluminescence,
yield on the specific energy loss of the incident particlei, There
are 3 fic-ures and 7 references , 3 of YMch are Soviet, 2 English,
3. Gerinan and I translation froir 3n~lish into Russian.
SUB7~iiITTZD June 3, 1959
G-qrd ZIP

(Scintillation (Paysics))

80557
5-J100 9201/9691
and Rozman, IX.
AUTHORS s Androyeshchav, Ye.A
TITLRs The quantum Yield of Fluorescence of Certain Substances in Polystyren
PMUODIGAL: Optika i apektroskopiya, 1960, Vol 8,,Nr 6, pp 828-831 (USSR)
ABSTRACTs At experimental technique of measuring the quantum yields of,
fluorescence In described and the results are given foreight
organic compounds in polystyrene. First the quantum yield of
2,6-diphanyl-1,3-oxazole (2P0) in polystyrene -was measured.. I Next
the yields of.the other seven ccmpounds were found relative to that
of 2P0. All'.samples -were prepared by V.M. Shonin-by thermal,
~polymerization method (Refs 1. 2). Both the incident photon flux
and the luminescence flux were meas ured using."quantum counters% i.&.
either:(l) a,'solution of:195-diphanyl-3(-I-phanylbutadianyl(-A2)pyrazoline
C
it dioxane (5 10-3 g/ml),, or (2) a plastic aciutillator containing
108 x -2 Mil ~ of .;1,5-diph -3-styryl-.1.2-pyratoline. -The
eny'.
quantum yield a pectra of I thes a two counters are given in Fig' 1 and
the experimental set up is shown in Fig 2. A monochrcmator SP-4
Card 1/2 was us ad: to: a epa rate out'the 313 mIL line from a mercury lamp spectrum.
The exciting light from the lamp fall on the samples

80552
B/051/60/008/06/613/024
H201/E691
The'CAuantum Yield of Fluorescence,of.Certain Substances,in Polystyrene
at 140 to the normal. PlAstic scintillstors vere in the form
of cylinders., (16 mm. diameter and 1 mm height), with polished front.
aurfacGo- -The rear surfaces of the sample4 were In optical contact
with:amolced abonite to prevent any reflection at that surface.
Fluorescenc a Was PRO86d through a US-17 filter to a -quantm counter
in optical contact with a photomultiplier FRU-29. The quantum yield
of 2P0 in polystyrene was found to be 0.80 �045 (Table 1). This
value -was. used. to obtain (by comparison with 2PO) the quantm yields
of the other Seven compounds in polystyronao :These yields were (Table 3)s
O..661� 0.08L,f6r 2,5- diphenyl-~-l,,~,I-oxydlazole; 0.06 for
acwAphthenej 0.1151L� 0.08 for a-terphenyl;, 0.73 � 0.07 for
O.L
for 1 1,4,4-tatraphonyl-1,3-butadiene,- 0.74 07 for
2 Z 2
1.3,5-triphenyl-~&.-pyra oline;, 0.76 � 0.10 for 1,3,4-tripheny1-& -pyrazolke;
.84 �'0.06 for 4-styrylatilbena. There are 2 gures , 3 tableS
0 fi
and 6 Soviet referene"
SUBKITTEDs October 12, 1959
2/2L
Gard

69139
AUTHORS: Baroni Ye. Ye., Kovy rzinat K, A.9 113/0"r6/60/04/63/027/038
Y o, And-reyeshchov, Is. Ye.., B005/BO16
Rozman, 1. M,
S h Ri----T-
ya, (Sukhumi)
TITLE: Plastic Scintillators on a Polystyrene Basis. IIIt
PERIODICAL: Zhurnal fizicheekoy khimii, 1960, Val 34,.Nr 3 , pp 665-667. (USSR)
TEXT: The authors synthesized polystyrene 8cintillatoralwith additions of various,
derivatives of pyrazoline, roIxaIzole,r ..a nd stilbene according ~to a standard method
(cf Ref 2). The synthesis'rofr s o,me of these'additions which have.not,yet been
described in publications, and the influencelexercised by the cis-trans-configura-
tion of 10,4,5-ietraphenyr 1 pyrazoline and p'p' -diphenyl stilbene.upon the in-
tenaity.of luminescence of:the'sointillators will be dealt with in a separate
paper. The,intensity of lumine~scence.of standard.samples of,the sointillators
synthesized (16 mm diameter 10 mm height) on excitation by P-radiation of a
Ce1441 144
Pr preparation was measured photoelectrically on an FEU-29 photo
multiplier. No correc tio nS were considered for,the spectrum of luminescence.ra-
-liatio,i,~for~'~self-.absorption etc. Thus, Ahe results obtained characterize direct-
ly the efficiency of scintillators,combined with a photomultiplier * Table .1
presents the results for the following luminescent addition a 22 deriva-
tives of A2-pyrazolineg 3 derivatives, of 193-pxazole,rl.derivative of..oxazolotie,
and 2 derivatives of rs'tilbene The efficiency of.stilbLnee mixed with P7terphenyl
Card 1/3

69139
Plastic.Scintillators on a Polystyrene'Basis. III S/076J60/034/03/027/038
B005/BO16
was also studied. For each of the additions investigated the table gives the con-
centration the addition of which cau.ses maximum luminescence of the scintillatorp
furthermore,.the relative efficiency on directexcitation of the addition.by ul-
traviolet radiation,.and finally the wavelength on whichthe maximum.of the.6mis-
aion spectrum is found-All the'ee-values are given~mithout-:~correotions-.'The effi-
ciency of an addition is directly -proportional to -the: Wan--tum-yield in -fluores-
cence and -depends on the. agreement -:between-- the-lumimesce-nce -spectrum--and the . X
spectral sensitivity of the -photomalti-plier. -The efficiency,-Df- the-scilitillator
further depends on the'extent of excitation energy transfer from-the polystyrene
to the.addition.~Among the additions lieted.i~ table 1-there ar e aIome.oausing
a very high dointillator. ef f iciency, which, may theref ore be recommended ' for the
manufacture of scint illators. The authors also.investigated,the applicability of
some-.of~the above-mentioned additions to the shifting of the spectrum in poly-
styrene:ecintillators.~Table 2 shows,the relative efficiency of.4 derivatives.of
Z-pyrazoline and of :-2 'derivatives of'sti'lben*6 withlrespeot,to.'the'shifting of
the.spectrum. in polyst.yrene...saintillators.'The.,measurements were also~carried
out by-means of an FEU-29,-photomultiplier. The concentration of theadditions in
these experiments was 0.001.g1g. There are 2,tables,:and,3 Soviet references.
.,Card 2/3

--------- ---
27700
S/12o/6i/o
00/003/010/041~
5,C)o E073/E335
AUTHORS: Baroni., Ye.Ye-, Killn, S.F., Kovyrzina, K.A.,
Rozman,,I.M. and Shoniya, V.M.
TITLE: On the Duration.of the:Light-emission of Plastic
Scintillators
PERIODICAL: Pribory i tekhnika eksperimenta, 1961,;No..3,
Pp. 72 - 74
TEXT: The results are described of.measurements of the
~light-emission time of the relative yield of luminescenc.e.for
a number of plast:Lc.scintillators based on nn.1vstvrene and
polyvinyltoluol. The measurements were made.by means of an
A-ray phase r-Luorimeter. The data permit estimating the
'Isultabillty" of plastic scintillators in"high-'speed circuits"..
The measured 'fluorimetrIc t1mes" ave~tabulated for plastic
scintillators with a single luminescent,addition. it.was
found that the times ifere particularly low for scintillators
ou'r
pomade of di- and triphenyloxazo-be, Oiphenyloxodihzole and
n-t
n-terphenyl.Of-the inv elstigated. s c int illat or's the largest HAt
alue was obtained.for scintillators with n-terphenyl, the;
v
v 1
C
Card 1/4

27700
S/12o/61/oOO/003/010/04i . . .
On the Duration of.,... E073/E335
optimum concentration being 4 g per 100 g of monomer. The
dependence of H/-C on the polymerisation conditions of
polyvinyltoluol showed an unexolained decrease in -r, in the
case of polymerisation at 200 C. The fluorimetric time
for polyvinyltoluol. equals 13.5 nanosecs for a polymerisation
0
time of 120 hours at Igo C and 11.5 nanosec for 30 hours
p6lymerisation at 200 C. Spectrum mixing,agents bring about
an increase in H owing to a.decreas.e of the self-absorption
in the basic addition and lead to a better correspondence of
the emission spectra with the spectral sens:Ltivity.of the photo-
electron multipliers. Howeverl the value of ~J,- also increases
simultaneously. The rfte of the spectrum-mixing agents 4P,
PPS and StS consists basically of the transformation of the
short-wave part of the illumination spectrum 3P into a proper
emission spectrum. Thereby,:the influence of reabsorption in
the, 3P itself on the externalmagnitude of the scintillation
and on the durat�on of thelight.emission is excluded. The
obtained data show that as regards the speed of theresponse
(Hl--'r-,) some plastics are superior to stilbene. Table 4shows
Card 2/4

2961j3
Ll S/120/61/ )00/004/0-94/034
E202/E592

AUTHORS: Andreyeshche--- Ye. A Elaroni:. Ye Ye Kursanova N.S-
and,
TITLF, Press-moulded plastic phosphors wi.th organo-metallic
additives
PERTUDICAL: Pribory itekhnika eksperimenta W) ~4, 19131, 151
TEXT- The atithors observed theinherpri-L loss ot' lumines-.
~cence in scintillating plastic phosphors. prepsreti i-n the orthodox
ifay~ by dissolving the or~;ant-)-metallic compouricis together,w�th the
luminescent additives.in a monomer.and subsequently polymerising
thp whole mixttire, Instead, the authors introduced successfully,
organo-metallic and organn-semimetalli-c compok.trias into plastic
phosphors at the stage of press moulding, The experiments were
based~on a plasLic phosplicr derived from the polymerisation of
Lr
styrenewith 3% p-terphenyl and 0,04% 1-3~-5 ..phenvi-2-pyrazoline,
Powder mixtures or tile above were compounded W-1th each~of the
following- Pb(C H HQ:/ Sn(C-H a n a ~z C H and we re
5 5 6 5 3
5
pre-gs-moulded for 3 bours At. 125-130'C ata pressure ~of '2~5 kg/cm
in a split~metallic mould in the absence of inert gas Since the
Card 1/3

29613
Press-moulded plastic phosphors, S/120/61/ i0o/oOlt/024/034
E202/E592
melting poknts of the li-j s,. two additives were above the moulding
temperature, the resultiivt ohosphors twere turbid whereas the
,r ema i n -t rig ttro add-itives r,tsp to:transpareut ;_-,hos 1) hors,, The
luininescenre of the abv%(, oh.-,),sphors~ was measured 1*row -the mean
current of a expomed to 0-particles and i t was
:found that a. -ery qlit!ziching of luminescence occtirred in
phosphors w.ith fl~.z and As _*mpounds. Thi s wa s a c t Y j hu t eci to the
relutively easy f'urmati,o-i aL' phenyi radicals and Oietr interaction
w1th the agents vesponsibl.k., Cor luminescence- Ot, tho other hand
relatively low qu;tnehing of lead and, tin compciun-d-s wits explained
by the absence of ptienyl radicals; The lowest Joss ut' lumines-
cence was observed with Lae tin compound additive, liz, 5% w/w of
Sn; in~ the phosphor reduced the relative luminescence autput to,
60%, Ali samples were It mm thick and 36 mm in dianteLer_ There
are I table,and :,j) referenct-sf 2 Soviet and 3 non-Sclv~ipt The
-1 as fol3ow.,; Re; 6asile,
J_Chem,Phy.-4.. i~VJ7, 2-,7_ doi; lo, A: M_ Hyman. J ~i Nvan, IRE
Trans. Nuci Sci 19~)8, zNS-5 No'13, 87,
September 29, i960,1
CAbstractor-s Note: The wot-d "Organoelemen tai a m s nome r it
----Card 2/5

S/l20/62/ooo/ool/olo/o6.i'
E032/E514
AUTHORS, Murguliya, G.Ye., Plyutto, A.A. and Rozman, I.M.
Tf TLI!',: Recording of neutrons 'from pulsed sources
PERIODICAL: Priboryi tekhnika eksperimenta, no.1, 196,2, 511-55
-illy
TExT: The neutron*yield of pulsed sources is usu,
measured with scintillation counters. Both the photomultiplier
in the scintillation counter andthe preamplifying circuits May
be affected by stray magnetic fields due to.the neutron source..
In the present paper the authors describe a method of recording
neutron spectra which does, not involve the use of a preamplifier.
The detector consists of a scintillation counter and the OK-17-bf
oscillograph equipped Airith a photographic camera. The counter.
probe unit incorporates the (FEU-210 photomul.-tiplier with
a plastic scintillat6r (diameter of 70 mm, height 70 mm). The.
probe i s- surrounded by a brass and lead screen., The current,
pulse from the photomultiplier is fed directly into the input,of
the oscillograph amplifier. The time distribution and the
iiitegral,neutron yield of pulsed sources can be deduced from the
appearance of the oscillographic records., With an effective
Card 1/2

S/12o/62/000/003/011/048
Z032/E114
AUTHGRS: Vartanov, N.A., Rozman, I.P-1., Ryukhin, Yu.A., and
Clikuasell, Z.D.
TITLE: Application of plastic scintillators to
~--spectrometlers
P:~o,.RIO DI CAL. Pribory i tekhnika eksperimentJ ;~o.3, 1962, 62-64~
TEXT: It is pointed out that scintillation P-spe6trometers'
have inferior energy,resolution as compared with magnetic
snectrorneters. flowe-vev, they may be useful in preliminary
experiments. The.auth ors have therefore investigated the possible
-se of polyvirxyl-toluene plastic scintillators in measurements of,
nts of ~-spectra. The scintillator was mounted on a
the end-poi-
aotomultipli r (cath pA/lumen).
high- sensli tivity p1 ie ode sensitivity 79
Good light collection I wasIensured by means of a perapex reflector.''.
Bac k scattering and edge effects,were avoided by collimating-the
beam with a copper diaphragm. The resolution for-the-
"i~ev line of C 137 was found to be 120j'o. The, end points of th
s 3. e
-~-Spectra of p32 co6O, cs137 0
and TZ2 4 were determined. The
results w-ere as fo' lo-ws: 1686 13 KeV (P32);
Cbtrd 1/2

S/12o/62/000/003/011/o48,
Application of plastic scintillators..
E032/E114
305 *7'- 3 1~eV (CO 60 5 0 7 Zt, 8 and 1165 Kev (CS137); and
(T)204). The total conversion coefficient fo the
75-7 10 r
U02. 'Kev -f-line corresponding to the isomeric transition of.Bal37.M
found to be 0.128 0.014, which.'is in good agreement with
-published results. It is concluded that plastic scintillators,,
:,.lay be successfully employed in 3-spectrometers for iitudying both,,
conver8ion electrons and continuous P-spectr.*t. Furthbr reduction
of back scattering should.facilitate studies of complex,o-spectra.
the determination of the intensity of isolated components.
There are 6 ligures.
SU31111ITTED: September 29,, 1961
Card 2/2

'E202/E192
AUTHORS: Kovyrzina, K. A. and R.ozman, I.M.
TITLE: Luminescence.of certain solvents
-pi"'RIODICAL: Optika i spektroskopiya, v.12,'no.2, 1962, 248-253
TEXT: The intensitj, of luminescence was measured,during the
exposure to soft ioni-sing radiations which do,not produce
Cherenkov light, in a. series of pure . solvents and in solutions of
'',up to 4~.,w/w, carefully purified 2,4,5-triphenyl-1,3-oxazol
ORO). The following solvents were used: n-terphenyl, toluene$
n-xylene, benzene, acetoner tertiary amyl acetate, 1,4-dioxan,
n-heptane, carbon tetrachloride,,.methylaldehyde, ethanol and..
water. Excitation was-by a variety of sources, viz:
210 14 147
(X - Po P-C P-Pm 25 kV X-rayl and 2652 UV. The
intensity of luminescence obtained with each source and each~
solvent was compared..,The-apparatus.was of the customary cell
type with diaphanous windows for the irradiation and a photo-
multiplier tube. The experimentation,included the following
measurements: absorption spectra of some of the pure solvents;
Card 1/2

3/051/62/012/005/009/021
L
`,075/E136
AU 4'-ialcs 1111ov, 1-1. Z and Rozman, 1.1"..
T -t LiL On tho transfer of energy in solid solutions
P;~I'i~!%,-~..,I, ZAL: Co t i ka i spektroskopiya, v.12, 110.5, 1962, 6o6-6og
SxpresE;ions were obtained for the decay of ligh
t
emission of doaor molecules and for the quantum yield of the
erier~;y of transfer from donor to acceptor molecules, Decay
fur~ction IN D (t) was given by;
t
IN t) N (0) exp q
D D 0 0
and the quantum yield of the transfer gIven as:
2
TIt '~qeq dx (.2)
q
'Where: 'ro mean life of the excited molecules of, donor in the
absence of acceptor, ;Ftnd q a value proportional to
Card l/ 2

Oti the trarisf'er of energy in solid S/051/62/012/005/009/0221
S075/si36
concentration n'~' of acceptor molecules,~which depends on their,
optical character-is'lics arid dielectric properties of the medium'..'
(factor D) and is iven by: -4
2N 1/2
2 TU 2/ ic 3/2
S
q nil, 3 13 n (3),
3 0 0
~D(t) and -q t -were evaluated for stationary molecules -with
different degrees of correlation between directions of the,
dipole moments of donor and acceptor molecules. It'was found
that Eqs. (1), (2) and (3) apply to solid solutions, but in
i-,q.(3) the nui;ierical value of parameter s. is*diffe,rent from
'2
The postulate of Foerster-Galanin, stating,that the
3
I-liolecules are points.in space, is considered acceptable-if the
average distance between donor and acceptor molecules R is
greater than the sum of their "radii" R 12, The critical
Colicen-tvation of acceptor, above which gqz;. (1), (2) arid (3) do
not apply, is 6.3 x 1o-3 11 - 3.
12
2/2 SUBMITMD: April 6, 1961

�/o51/6,2/013/oop/o~~?/o,~4
j~WVE5.~4
'AUTHOR: Rozmah, I. M.
TITLE: On-the dependence of the radioluminescence yield on
the particle energy
PERIODICAL: Optikai spektroskopiya, v.13, no.2, 1962,,,287-288
XT: there is no adpquate -theoretical
E, It is 'stated that
T
explanation of the fact that the radioluminescence yield.of org
substances in the condensed phase, which is excited by heav
Y.
particles (a-particles, protons etc.,), is smaller than in the case.,,
of electron excitation. According to the hypothesis.'of M. Furst
and H..Kallman (Phys. Rev., 8.5, 816, 1952),, the luminescence
quenching is due to the interaction between excited molecules
whose local density in the track of a heavy partirles .is very
large. Owing to the interaction the excitation energy of two
molecules mayturn out to.be concentrated in one of them.,and,, as_a
result, both "portions" of energy or only one of,.them may be.lost.
'The present author estimates the fraction of llac~ivation'sll -which:
m.ay,be lost in this,way, -assuming that the quenching proc.esses
are instantaneous. The me'an-density of "activaiions" i the main,
Card 1/2

On the dependence of the S/051/62/013/002/012?014
E032/E514
track of a slow particle is computed with ihe aid of,'the.formula
1 f dE
n
2
IrR W dx
ahere dE/dx is the specific energy loss in the given part of the
track, f is the fraction of this energy~ carried away by 6-electrons'
beyond the limits-of the interaction,radius R, and W is the
average energy per "activation". The values 'of dE/dx, f and R
are taken from a previous paper (Izv.AN SSSR, ser.fiz., 24, 567,
1960) and W is assumed to be 8 eV (Izv.AN SSSR, ser.fiz., 23, 102'
1959)., Next, it -is assumed that the distribution of the molecular
"activations" follows the Poisson law and the number of lost
Ifactivationstl is estimated., The resulting formulae are then used
to calculate these quantities for anthracene and it is pointed out
that. it will be desirable tocarry out experimental studies, of the
ra,dioluminesoeno.a.yield an a fUnation of.molecular dimensions,
~T re
.for example in the-gaseous phase. he is I table.
SUB11MITTED: February 17,1962
Card 2/2

ACCESSION NR::''AP4009134 S/0056/63/045/006/2067/2067
AUTHOR: Demin,4, 0. j Rozman I M
V
TITIX: New sbortlived isomers of ruthenium and tellurium,
SOURCE: 'Zhurnal eksper.,i teoret. fiziki, VI. 45P no. 6, 1963, 2067
TOPIC TAGS: ruthenium,.~tellurium,, ruthenium~isomer, tellurium isomer,"
new isomers',, shortlived isomers, Alpha bombardment of tin, Alpha
bombardment of molybdenum, deuteron bombardment of tin, deuteron
bombardment of molybdenum, radioactivity, radioactivity, gamma yield
ABSTRACT: Thick.targets. of chemically pure'molybdenum and t in were
bombarded with.22-MeValpha partleles and 11-MeV deuterons.
target gamma rays were detected with a scintillation counter and
multiplier. Alpha particle bombardment of the molybdenum and tin
yielded new activities with half-lives 1.85 � o.o6 and 104 + 5 msec.
and gamma-ray energies 227 and 284 (� 5) key, respectively.- The tin
gamma spectrum also showed a weak 85 � 5-keV line. A deuteron bom-
bardrient test showed that only Ru had an activity with 1.84 msec half
life. It is therefore concluded that the 1.84 and 104-msee isomers
Card 1/2
_A

ACCESSION NR: AP4009134~ ~
are 97, .117., :Ru-97, and Te-117 or Te-115., The Te isomer ,yield,is
1X10-7. and,is
close x
calculated value
to the 10-7.
l ,
,
ASSOCIATION- none
SUBMITTED: 24Aug63 DATE ACQ: 02Feb64 ENCL: 00
SUB CODE: PH NO REF SOV: 004 OTHER: 002
Card 4V2

S/12o/63/000/001/008/0*72
of E032/Z314
o.f 0.7 at 1D k. eV is.employed. Ionization: is then Ioc 'lized nea
a
h e windoi-,r in such cas'es and in order:to:produce:a more uniform
electric field in this-, region the illner electrode carries a thin-
3 o en e
2 mm) pex-spex disc. , The battery. - .2.9 used t sur
complete collectlon of lons. ,The insulators are made of'teflon
and will ensure retention of the charge on~the collector, for a
a Th e
J. o%T hours. The. c pacitance Of the chamber.is 33-5 pF.
charge is measured vrith a vacuum-tube voltmet.erL',.%rith.an input
0 1 1 1 1 -14
capacitance of about 1 pF and agrld c *urrent of less than 10 A.
The chamber may be filled,with air -(aluminum walls) or.with'
x
.crypton or enon.(Steel walls).7I.Ebcamination of the experimental
results, shovjs that, the sensitivity,. f. the device is great er. than
that of the sensitivity:of.the phic~,meth Dral
hotogra od by.sev4
P
ders of magnitude alth ou gh it.:is j,-iuch lower%than 'tha .t: Of I.th
e.
sc intillation :method. However .!'~:Lt. has, the, great advantage of
s1mplIcIty and Independence of el'ec~tromagnetlc pick-up.
There are,3 ure
fig s .
AN GruzSSR
ASSOCIATION: Fiziko-t ekhnicheskiy: -institut".
.(Physicotechnicai;:,I'n'~-rititute'of~ the AS Georgian SSR
Card 2/3

S/0051/64/016/004/OG63/0673
ACCZSS 10N N-11: ANWZ2370
U-
ilin, S, F. Nfildiolashvili,. M. S. Rozman, 1. Lt.
TITTZ--. Concerning radioluminesconco of organic substances. 2. Specific lunines-
canco quenchin-g under excitation by fast electrons
SOURCZ-. optilca i spolctroslcopiya, v.16, no.4, 1964, 663-673
TOPIC TAGS: cathodoluninescence, radioluminesconce, luminescence quenching, scin-
tiulator, triplienyl derivative, ietraphanyl derivative, triphenylpyrazoline
ADSTPIACT: Parts I and 2'(S.F.Kilin, X.A.Kovy*rzina and IJI.Rozman, Opt.i spelctro.
Sbornik I.Lyuminestsen-tsiya,p.147,Pub..I.'i SSSR,1963; S.F.Kilin and LM.Rozman, Ibid.
~15,494,1963) of the present'series of papers.were devoted to description of the re-
sult's of investigation of the luminescence of alcohol and water solutions of a num-_
bez ol organic compounds. Appreciable reduction of the persistence of luminescence
under,x-ray excitation as compared with luminescence under photoexcitation was tak-1
on as evidence of spacific.quenching of radioluminescence in these solutions. The-~
present paper gives further experimental results and an interpretation thereof. 11,
There were studied two-component liquid and plastic (solid) scintillators irk which
Card 1/2

ACCESS ION XR- AP4032370
the solute molecules are acceptors of.the.clectronic excitation-andrgy acquired by,
the solvent molecules. Data, in the form of curves of the luminescence. yield and.
persistence as a function of the solute concentration, for 2,4,5-triphcnyl-l,3-o.%a
in toluene, 1,3,5-triphenyl-A2-pyrazolihe in toluene, 1,1,4,4_tetraphenyl-l'3-.
butadianc in polystyrene, and triphanylpyrazoline in polyvinyltoluona under excit,a-
tion by ultraviolet (2G52 X) and fast electrons from C14 are presented.in. figures..,
It is shown that in the case of st.imulati6n by electrons there is evinced an added
dynamic quenching of the acceptor luninescence.- A phenomenological theory of the
effect is proposed; this leads to the correct,relationships between.values of the
persistence and yield of radioluminescence (cathodoltininescence) and of photolumi-
ncscence. It is noted.that such added dynamic'quenching is exhibited.not only by
good sintillators, but also by organic substances inwater and alcohol solutions
(see second reference above). Orig.art.has: 3.3 formulas 8figures-and 1 table.
A S S CC Lit T I ON: none
SUBMITTED; 0lJunG3 DATE ACQ- 0711ay64 ENCL: PO
SUB CODE: OP NR REr SOV: 010 OTHER: 005
C.,d 2/2

des,
the dl;~q htd~i-~fly~o qe~.
w
vIscos 01-
s ution: in-wiich t fusion: andAresonancd',,;~.tr 't
a4s er.j,-
-66~ ~-Roman ,ovs y Ph~b'. -R----- - 5~-
the of, .V-.; ht~ il_llm)
the
_~_!-cal6uiaiio'n- resu q qqa~,;i'6 ~"dffidibncy~_~;qg i~_A_ unct i~.oiihe
-toi concentra ibn~
entva
y~hjch
3.-'- b th ii ii 6 Wr~"'n~ a"~nce,-.' V
ie
of th ano.r:,mg equ_es x it ti'
fer distan66) die' m:o curves e:- S S;-F numeric g
presente
i-- afioimr 2for-
-~ca ny!4, .4 z6 Ife
iiioien~i!lAndI tii~he- p~~ia
----- - _,ne
enzer ai-phenyloxazole in xylene! ar!~. 'Oqmpared,-_wIt
_1!~t 'P~
values-and fr-om.%-theliterat U&
at a", ma i ni p.~~'eVa e~.
cance,~_p_-.,,t
fusion-Mechanism.- he:'authorb.-
~~t)mpute*t
M, a formu as,
ires and I-table.
N,
y
-none-
ISSOCIATIM
"a
W, CCM~--M~ OP:-- -

,".-TITLE Rad iolumirfe
:ratio-,~of -.Plastic---sc

~4038-65
!CESSION.:.

14638465.

lomHuecwlpylo arl
.'-I;ii4,4-T6Tpa4)eimi-ii3-6yiraXi6i~
-4/4
aid-,.
C

'ACCESSION -,'NR.- ~~-.'APA-0487
A'
UT.Ii RS -s~
p
,.,.L,.L,rut;*--.--.xact3.oium3.nescei
,!,:,luminescence- of. soltiti(
and---- di~di

TI. TLE i I d
ntro-,,_u
'60ic' t
omna
'o
GS
n g

_--- --Z:' ~
--~
1

L- 1-10815-66
,ACC NRi ATS023439
2
Fig. I.--- trlp~enyl-A 'pi
2--1,3,5-
1and
q .
zole 'in polyvinyltoltiene;~..3 and
4"lil ~,4_
tw
0 , V) M
0 _
h li 34~tadien -, li'polystyrene;'_
tetrap enyl-w
0 curives~l and 3 -excitat orrby ;K-rays.an

bo euxves 2 and 4--excitation by, UV.. light ~il
320
6-3800.4.
41 > 441
4J t1d'

dd tive.concentration,
s
mole 11
2. land 2--raticis'. f,
0 -quantum:yields
9
f lu-
of additive orescence during,excitation.
z lVent.-.(k ='265T -and -indirect:
so
of,additi4i'. w=--13061)'~ 3:,.and,,:*!l'!'l-

.~ex
rat os,of.. _~C, ty-"Clur ng,
A.1imin en

u
i'..:' .
14
6itation of C_ ..-~ampound, Y4 .4~d

(D
(A ~'3650 A) ii"~ -i ii&
p o ons.

h .3 ~-plast 6-istatii".
ass CMMS,
D
A

4z
- 14 A

:ard 2i3 A

Translation from, Referativnyy LhLLrnal, Geologiya, 1957, Nr 10,
p 12-13 (USSR)
p
AUTHORS: Vodorezov, G. I., Rozman,
TITLE: The Devonian Rocks of the Kempirsa,yskiy Region as Re-
lated to the Problem of the Age of the Ultrabasic Rocks
of the Southern Urals (0 devonskikh otlozheniyakh Keml-
pir~ayskogo rayona v svyazi s voprosom o vozraste all-
trabazitov Yuzhnogo Urala)
PERIODICAL: V sb:, Materialy po geol. i,poleznym iskopayemym
Yuzhnogo Urala, 'Mr .1. Moscow, Gosgeoltekhizdat, 1956,
pp 16-27
ABSTRACT: Cambrian, Ordovician, Silurian, Devonian, and Carboni-''
ferous rocks are Involved in the ge.ological.s.tructure of
the region. Numerous'intrusions of ultrabasic rocks of
varioussizes penetrate the pre-Upper Devonian beds.
The largest of these is the Kempirsayskiy.ultrabasic
pluton. Abrief description of the Devonian rocks of
Card 1/4 the Kempirsayskiy region is given; they are-most'fully.

15-1957-10-13545
The Devonian Rocks of the Kempirsayskiy Region as Related to the
Problem of the Age ofthe Ultrabasic Rocks of the Southern Urals
developed in the western part of the region. L in unconformably
Y Tfrom the base
on~the Silurian there occur the following series
upward): 1) Shandinslmya series (Eifelian, 150 mi --conglomerates,
sandstones, tuffs, and lenses of limestones with Carinatina ari-
maspus Eichiv-, ELi~~inskia. conjugula Tschern., and Spirifer ALI~~
Eichw.; 2) Chancharskaya series (Eifelian, 500 m)--~_orphyrites
r es Givetian,
and albitophyres and their tuffs 3) Aytpayskaya se i
100 m)--conglomerates and conglomerate-brecclas, with lenses of
limestone, resting unconformably on lower beds and containing
corals (Fascyphyllum, Grypophyllum, and Stenophyllum) and brachi-
opods Atrypa desquamata var. totaensis Khod., Gypidula:acutolo-
bata. Sandb. , G. biplicata Schnur. , Iand Uncinulus angu laris-I Phil-
lfp's); 4) Yeg_EndI_nsksji~__series (upper Givetian-lower Frasnian,
300 m)--siltstones- siliceous shales, and local laminated bitu-.
minous shales; 5) Zilairska~a series (Frasnian and Famennian,
400 m)--sandstones and shales, and subordinate conflomerate. mem-,.
bers; and 6) Kiinskaya series (Famennian., 380 m)--siliceous bitu-
Card 2/4

.15-1957-10-135415
The Devonian Rocks of the Kempirsayskiy Region as Related to the
Problem of the Age of the Ultrabasic Rocks of the Southern Urals
rocks, with limestone in the upper part with Clymenia
(Bilaclymenia, Cyrtoclymenia, and others) and trilobite-s--CPha.-..
cops, *oetus, and others). The sedimentary and tuffaceous
rocks of the Coblentzian and Eifelian are everywhere cut by small
intrusions of ultrabasic rocks. Such intrusions are not found
in the sedimentary and effusive rocks of the upper Givetian,
Frasnian, and Famennian; these relationships support the Givet-
ian age (probably comprising the whole upper part) of the ultra-
basic intrusions of tile Kempirsayskiy regi It is noted that
the Khabarninskiy and Kempirsayskiy masse3lkd 'the interforma -
tional intrusions in the western part of tile regioN gre of the
same age and are very closely related. The rocks adjoining the
masses mentioned above are Cambrian, OrdovNian,.and Silurian.
The interformational intrusions, which are distrN%4ed to. tile
west, are considered by the author to be.peripheral apozhysds of
these masses, occurring at higher stratigraphic.levels. In %he
eastern part of the region there occur individual ultrabasic.,
~-Card 3/4

15-1957-10-13545
The Devonian Rocks of the Kempirsayskiy Region as Related to the
Problem of the Age of the Ultrabasic Rocks of the Southern Urals
intrusions which are also associated.with the Kempirsayskiy.
mass. The author considers these to be later derivatives of ~an~
already completely emplaced,mass, squeezed out into the adjacent
country rocks during tectonic tensions in upper Givetian andil
partly, in lower Frasnian time. Objections are cited against
C3
the practice of classifying intrusions by age "bands" and it is
proposed that these intrusions be differentiated by their rela-
tions to tectonic structures.
Card 4/4 1. N. Krasilova

(Barchogur region--Bruchiopoda., Fossil)

1. Chlen-korrespondent AN SSSR (for Peyve).