"SCIENTIFIC ABSTRACT LOMANOV, M. F. - LOMAYA, O. V."

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000930430007-5
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Sequence Number: 7
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

120-5-4/35
The Eifect of Overlap in the Mcasurei.,.entz-, of Track Density in a
Bubble Chamber.
straight line with a inean density g The distribution of the
distances x betweeii the centres of the 1"ubbles is Poissonian
and is therefore of the form:
w(x)dx = g.exp(-gx)cL--
When overlapping occurs, a track consists of cl!jsters and gaps
shown schematically in Fi-.l. The integral distribution of
gap length can be derived fi-om the above Poissouian distribution
and has the form P(1) = exp(-EL). Tlis distribution was con-
firmed exDerimentally excludiriC very short Gaps (when I is
less than D/2) which have to be rejected (Ref.1). The latter
equivalent to an effective incrca.,-e of bubble size. The foll-
ow-ing.methods are considered: 1) Gap distribution. The main
disadvantage of this Piethod is that statistical errors are large
near the region gD' = 1 vhere D' is the effective bubble
size. 2) Mean gap size. 3) Transparency of the trck. This
is defined as the mean ratio of the total ler.Eth of all the gaps
greater than 10 and the length of the track.. It is shown that
ar d2/ 3when gD' is les-,~ than 2 then the triethod of the "tronsparency

1 120-5-4/35
The Effect cf Overlap in the Measurezents of Track DE~nsity in a
Bubble Chamber.
of the track" is Liost convenient, and for gD1 Creater than 2,
the method of "number o'1 n-aps" is suitable. Fi:r.2 shows curves
of
( 6 g/ G
as a function y where ag/g is the statistical error in g
L is the total lenLth of the track, y = gD1 = g(D + 1 0)
in this figure, Curve 1 refers to the gap densil;y, Curve 2
mean length of gap, Curve 3 - transparency of the tracki
Curve 4 transparency of the track with rounding off, and
Curve 5 accuracy in the absence of overlap.
There are 2 figures and 9 references, 3 of whicl, are Slavic.
SUBMIT7ED: March 11, 195r/.
AVAILABLE: Library of uont-xess
uard 3/3

56-6-4 4156
AUTHOR BLINOVj G.k.,YU.S.XRESTN1KJV, LCIMANOV, 111.2.,SHALALIOV, Ya.Ya.
TITLE On the Use of a Mixture of Ti,:o Liquids lor a Bubble Chamber.
(Primeneniye smesi dvukh zhidkostey dlyE pu2~Tlkavqy karner.(-Russian).
PERIODICAL Zhurnal Eksperiq.j Teoret.Fi4iki,1957,Vol 32, 1(r 6, pp 1572-1573
UeS.3,Rs
ABSTRACT If the dimensions of bubble chambers are enlarged,the technical
difficulties connected with their operation are increased, for it
is necessary to provide for such temperatures and pressures in the
chamber as correspond to the liquid used-These difficulties might be
removed to a considerable extent if it were possible to work at a
temperature that is near room temperature.Porhaps a good working
temperature might be attained by the suitable mijdure of two liquids
(as e.g. propane andphreon). Por this purpose the authors carried
out experiments with a bubble chamber which was filled with a mix-
ture of phreon-12 (CC12F2) and phreon-13 (CClF3).The construction
of the chamber used for this pur ose has already been described in
a previous paper.By fitting a Cogo-r- source beside the chamber,
it waa possible to watch thm traces of the eleotronu and to photo-
graph them.In this way it was possible to find out at what tempera-
tures,pressures, and concentrations,the traces can be obaerved.The
authors selected mixtures of two different compoeitions.The data of
the two mixtures are given.The experiments were carried out in the
Card 1/2 case of the first mixture at temperatures of from 19 to 380C and in

On the Use of a Mixture of Two Liquids for a Bubble *
Chamber. 5&6-40/136
the ease of the second at ttmperatures of from 43 to 520C. he results
of these experiments are given in form of a diaSram. The chamber
was expanded every lo minute3.1n the case of all experiments car-
ried out pressure in the chamber between expansions amounted to
35 atm. The duration of sensitivity was deternined photographical-
ly*The ahamber works satisfactorily with a mixture which,at room
tenperature,has a pressure of the saturating (saturated) vapors of
about 21 atm. The mixture used here is suited for many nuclear
inve3tigations because of its high density (1-1.o Zlcm3). Using
such a mixture of liquids might render selection of the filling me-
dium forthe chamber more easy.Also mixtures contgining hydrogen
as e.f. methane and propane,are interesting.
(1 illustration).
ASSOCIATION Not Given.
PRESENTED BY
SUBMITTED 8.2-1957
AVAILABLE Library of Con~ress.
Card 2/2

SOV-120-5,;-1-5/113
AUTHORS:Blinov 7 G.A., Mesh...-ovs-',,,iy, A.G., ')hala-.-.ov,
Ya.Ya. and Shebanov, V.A.
TITLE: A Large Freon 1subb1c Chamber (Bollshaya puzyrlkovaya
freonovaya kamera)
PERIODICAL: Pribory i Tekhnika Eksperimenta, 1958, Nr 1, 2 plates
and PP 35-38 (USSR)
ABSTRACT: The w-or-'i:in- volume of the chamber described in the pres-
C>
-ent paper is 17 litres and it works at room temperature at a
pressure of 38 atm. A mixture of freon-12-freon-13, having
a density of about 1.2 is used. The maximum path of particles
in this chamber is 0.7 of the mean path between nuclear
interactions. A diagram of the chamber is shown in Fi-.1.
The main body of the chamber is made of steel and the windows
ar6 covered by plexiglass plates, 9 cm thick and attached to
the body of the chamber by steel flan3es. A description is
given of a device giving good pressure control. The chamber
was used in the beam of the synchrocyclotron of the United
Institute for Nuclear Studies. The beam employed was either
the proton or the neutron beam, the maximum energy being
680 MeV. FiG.3 (facing P.34) shows a photograph of particles
scattered from a paraffin target irradiated with 670 MeV
Card 1/2 protons. The following persons are thanked for their inter-

SOV-120-58-1-5/43
A Large Freon Bubble Chamber.
est and collaboration: A. I. Alikhanov, V. A. Beketov, Yu. I.
Makarov, M. G. Polikarpov, V. A. Shchegolev, V. P. Rumyantseva
and Ye. V. Kiaznetsov. There are 3 figures, 1 table, and 8
references, of which 5 are En-lish and 3 Soviet.
L.2
SUBMITTED: July 4, 1957.
1. B14bble chambers--Design 2. Bubble chambers--Materials
3. Methyl halides--Applications 4. Particles--Detection
Card 2/2

';OV
AUTHOR3,Lo-,.,ianov. 11 Shchegolev, V. A.
-aa2y_,~~
TITLE: Application of Hidrogenous Liquid3 in a Babble, ChaTiber
Working at Room Temperature (Primeneniye vodorodoo~ierz_ha-
shchey zhicEZ013ti V puzyr'kovoy k1amere dlya raboL.--f
hloianatnoy temperature)
PERIODICAL: Pribory i Telclinika Eki3j,;erimeata, 19563, Nr 71, P 103
(U033R)
ABSTRACT: Blinov (Ref-3) has shovin that propane (C H ) may be
W"10. 'ilo;."ever?
used as the working liquid in a bubble c 8
the workling temperature is then about 64 In order to
obtain a working liquid which could be used at room tem-
perature tiie present authors have tried a mixture of
propane and ethane. The chamber which -aas used in this
work was that dezcribed in Ref.4. The critic8l teaper-
atures of these two liquids are 96.3 and 32.1 C, respect-
ively, and are close to the critical teii~iperatures if
freon-13 and freon-12. Therefore, similarly to the fre~jn
mixture, a mixture of two-thirds of technical rjro-)ane and
Card 1IR

3OV-12 j- 51-)'- 3-27/33
Applicati.on of HydrogenoU3 Liquids in a Bubble Chamber aU
Room Temperature
one-third0ethane (by voluiue) was employed. At a temperat-
ure of 25 C the pressure of saturated va ',.our of such a aiix-
ture was 23 atia. Experiments have sho-vin that the use of
the above liquid mixture does not involve any additional
technical difficulties. There are no figures but 5
referenc,::s, of which 4 are Soviet and I En!~Iish.
SUBMITTED: Septeimber 20, 195?.
1. Propanes--Temperature factors 2. Ethanes--Temperature
factors 3. Solutions--Properties 4. Vapor pressure--
Temperature factors
Card 2/2

240)
AUTHORS: Blinov, G, A., Lomanov'_2__2" SOV/56-315-4-7/52
Shalamov, Ya. fa~.,Shebanov, V-.-'A., Shchegolev, V. A.
TITLE: Investigation of the Interaction of If'-Mesons With Light Nuclei
in the Energy Range 80-300 MeV (Issledovaniye vzaimodeystviy
e-mezonov s legkimi yadrami v oblasti energiy 80-300 MeV)
PERIODICAL: Zhurnal eksperimentallnoy i tooreticheskoy fiziki, 1958,
Vol 35, Nr 4, pp 880-886 (USSR)
ABSTRACT: The investigations were carried out in a Freon bubble chamber
(17 liters, 50.22-15 cm3) for ten energy values in the range of
80-300 MeV; measurements were carried out, for the interaction
between positive pions and C-, F-, and Cl-nuclei, of the charge..
exchange scattering cross sections, of star production cross
sections, and of total elastic and inelastic scattering cross
sections. In the interval of 210-300 Mov the production of
charged pions by fi~-mesons was obser7ed in 6 cases. In transition
from 60 to 200 MeV the exchange scattering cross sectiori is
doubled and attains 10% of the geometric nuclear cross seotivn.
The star production cross section has its maximum at about
Card 1/3 180 MeV. Also 260 MeV proton interaction was investigated.

Investigation of the Interaction of fi~'-Mesons SOV/56-- 35-4-7/5 2
With Light Nuclei in the Energy Range 60-300 YeV
A comparison of stars occurring in exchange scattering vii th stars
oocurring in the interaction between protons and C., F.., and
01-nuclei shows that exchange scattering in light nuclei oo,;urc
as a result of a single interaction of the inciding e-meson
with the individual nucleon of the nucleus. Comparison of stars
occurringin absorption with those produced by protons shows that
within the energy interval tnvestigated e-absorption is in
general the result of a single interaction of the r+-meson w~~th
a proton-neutron pair. In the case of 200 MeV e-mesons this
process occurs in 60-7Vo of cases. The experimental order and
the carrying out of the experiments is described in detail.
Results are shown by diagrams and tables. Figures 2-4 show
photographs of charge-exchange scattering processes. Figure 4
shows a typical case of a iT 0 + e+ + e- + f reaction. For
e-mesons the exchange scattering reactions with free nucleons
develop according to the scheme en -+ ff)p, and the absorption
(E pion