SCIENTIFIC ABSTRACT VAYSENBERG, A.O. - VAYSENBERG, A.O.

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

19 T --f - rf A,; /-:~ 'r fe C-
Category POLAM/Nuclear Physics - Structure and Properties of Nuclei c-4
Abs Jour Ref Zhur - Fizika, No 2., 1957 No 3176
Author :-~~nb~erg, A.0.
Title : InvestIg-afTo-n-5-f-Internal Structure of the Nucleus with the aid of
Mesons and Electrons
Orig Pub : Chem. szkole, 1955, 1, No 5, 4-14
Abstract See Ref. Zh. Fiz., 1955, 18528
Card 1/1

V'I
ALIKHANIAII,A.I.,; VAYSMIMG.A.'U"., kandidat fiziko~-matematicheskikh nauk
IlementarY Particles. Tekh. mol. 23 no.5:10-14 JKv 155. (HIPA 8:6)
1. Chlon-korrespondent Akademii nauk SSSR (for Alikhanian).
(Particles, Elementary) (Nuclear forces)
0

U'c'-R/Nuclear Physics
Gard 1/1 Pub, 86 3135
Authors Vaysenberg, A. 0.
Title, Research of the internal structure of the nucle-,is with the aid of mesons
and electrons
Priroda 44/2, 24 - 30 FeV 1955,
Abstract- A study is made of the structure and characteristics of the nucleus. It is
found to possess periodic properties, since the energy binding protons and
neutrons together changes, in periodic fashion., with the increase of these
particles. Two experiments are described in which measurements are made
of the spectra of X-ray radiation of moso-atoms from Alp Sip Cu.. Zn, Sb,
Xg and Pb; and, another in which the dispersion of rapid electrons is
studied. Four reference3 2 USSR and 2 USA (1953 195Q. Diagrams-; graphs;
table.
Institution
'Submitted

v
A x
vlj J~

ljjjY-K ILN37~- P -)NikND K
L (HYPER(.
MESONS). A. 0. V!a1gjanabber uspekbi FIZ. 0.11-
-NSA 10-~7
(it p to date data on chz,~W,A;~'
SLY Chargml W';partlcles. K.Meson and hyperon k)r=-dGn,;. ajl~
t ons with nuclei are presented, (R.V.j.'-
io
IM I
04~

VAYSENBERG. A.0. Nbskva)
Recent data on elementary particles. YIz. v sbkole 16 no.6:
7-17 N-D 156. (MLRA 9:12)
(Particles, Elementary)

120-2_31/3?
AUTHOR: Vaysenber A. O~_, Smirnitskiy, V. A,, Rabin, N. V.
_2ZL~~~
TITLE: A Microscope Stage for Particle Scattering bleavirements
in Nuclear Photoemalsions. (ffdkroskopnyy Stol dlya
Izmereniya, Rasseyaniya Chastits v Yadernykh Fotoemull-
slyalth.)
PERIODICAL: Pribory i Tekhnika Eksperimenta, 195?, No. 2,
pp. 112 - 114 (USSR).
ABSTRACT; The development of 'the photoemulsion cameras has lead
to an increase in the track lengths which can be observed,
an increase in the statistical accuracy of scattering
measurements, and the independence of experimental results
from the degree of development of the emulsion. Among the
factors which determine the accuraiay of scattering measure-
ments, the most important are those due to the noise which
exists because of the finite grain size and intervals
between them, to the noise introducedby distortion, and
to -the noise due to the microscope stage, the longitudinal
displacement of which is accompanied by small transverse
displacements equivalent to scattering., It was required
to have a microscope bench with lon&itudinal movement of
a few cm and with not mom than 0.01 micron of the trans-
verse displacement. The present type of the "sprang
Card 113 action" microscope bench is clue to Cosyns .(Ref. 1) and this

1 1/ 37
A Microscope Stage for Particle Scatteriiig Measurements in. 'Nuclear
Photoemulsions.
principle is also used in the KOPH-1JKA M-52 bench. :.1--he
bench has the following drawbacks: springs have to be
accurately calibrated, it is temperature and load sensitive
and its noise increases at larSe dis-placements, Since a
glass surface can be prepared to a very great accuracy,
the authors have constructed, and now describe, a micros-
cope bench using two accurately prepared glass plates as
guides. The action of the bench can be clearly seen from
Figure 1, where 1 is a heavy steel plate with two steel
blocks covered by the above glass plates acting as buffers
and guides. The "noise" of the bench has been measured
by means of the Michelson interferometer with results
given in Figure 3, where the abscissa represents the
maf,mitude of the displacement and the ordinate the mean
value of the second order differences (curve A), which
represents a "noise" of 0,005 micron for the displacement
of 50 to 100 microns. In the same figure curve B represents
the noiso of the KO.F~iI41U-IAI 52 of GottsUeim (Ref. 3). Two
photographs of the bench assembly and two graphs of
e:~merimental result-s are given. There are three references,
Card 2113 none of which is Slavic.

120-2-31/37
.-A Microscope Stage for Particle Scattering Mleasurements in Nuclear
'Photoemulsions.
SUBMITTED: November, 14, 1956.
AVAILABLE: Library of Congress .
Card 3/3

AUTHOR ZIKHANWI, A.I., VAIS&IBMG, A.O.~ Pk -295o
TITLP; The Spectrum and the Positive u1irplus of the Hard Component within
komentum. Domain (0, 3 -17) . lo9eV/c atian Altitude of 325o m.
(Spektr i polozhit,ollnyy izbytok-zhastkoy komponenty v oblastl im-
puilsov(o,3-17).lo9eV/c na vysote 325o m - Russian)
FMIODICAL Zhurn2l Eksperim. i Tooret. Fiziki, 1957p Vol 32y Nr 3,
Pp 4l3_Ll6,.(U.3.J.R.)
Received 6/1957 Reviewed 7/1957
ABSTRACT The present work continues the measurement begun previously (VAYSLMERG,
A.O.,, Zhurn. Nksp. i Toor. Fiz., 1957, Vol 32, Nr 32 P 417) of the mo-
mentum spectrum and.the positive surplus by measuring the domain of much
higher momenta of up to 1,,7.10 10 eV. -Measurements were carried out in 1952
with the large magn*t'-c spectrometer of the AJAGEZ laboratory at a magnetic
.field strenght of 137oc Orsted. In the case of such a field strenght. the
probable measuring error committed when measuring the momentum 1 7.1o 10 ev/c
amounts to about 5oo/o. The construction of the magnetir. spectrometer and
the utilization of the results were already dwicribed several times. Above
the measuring system a 7 em thick lead layer was mounted and the entire
thicknex3 of all lead absorbers above the counter series amounted to 5,8
cm. Below the loth'series of counters a 14 cm thick lead layer) and below
this aeries a~ llth series of counters was located. The particles passed
through the mentioned lo seiies of counters without increasing were as-
cribed to the hard component. The rang of these particles was larger than
Gard 1/2 5,8 cm lead..The range of the particles passing also through the 11th coun-

The Spectrum and the Positive Surplus of the Hard Compo- FA - 295o
nents within the momentum Domain (0,3--17).109*Vc at an Altitude of 3256M.
ter series was larger than 19,,8 am lead. Moasuring results obtained by
measuring of the momenta of 8966 particles, i.e. the amounits n+ and n,_ of
the positive and negative charged particles respectively, the momenta of
which are in the intervals mentioned., are given in a table^ These results
furnish the momentum-spestrum and the distribution of the positive surplus
over the spectrum. The last column of the table contains the values of the
posItIve surplus for the total. interval of the momenta of from 0,3 to
17.lo9eV/e. This surplus over the entire Inttrval has the value
k-5oB2/3666 - 1,39 � o,o8, for particles with a range of R 5,8. For par-
ticles with a range of more than 19,8 am lead, the positive surplus amounts
to k - 2929/2271 - 1,29 * o,03. The integral speotrum of myons computed on
the basis of the ranges of more than 19,8 am lead for momenta of above 5.109
*V/c is described satisfactorily by the experinerital function p-ywith
the exponent y - 2,45 � o905-
(2 ill, and 1 table).
ASSOCIATION Physical Institute of the Academy of Science of the Armenian tZR.
fRESENTED BY
SUBMITUD '6-lo-1956.
VAUABLE Library of Congress.
Card 2/2

AUTHOR VIYSENBERG A.O. P1 - 2951
TITLE --TFe ~Speotra of the Moment& of Cosmic Radiation and the
Positive Surplus withIn the Interval (0,1 - 2,5) 109 eV/o
in an Altitude of 3250 m.
(Spektry impulsov kosmioheskogo izluoheniya i polozhitellnyy
izbytok Y intervale (0,1 - 295)-109 OV/0 na, vYsote 3250 m--
Russian)
PERIODICAL Zhurnal Eksperim. i Teoret. Fiziki 1957, Vol 32, Nr 3,
PP 417 - 422 (USSR). - I
Recei'ved: 6/1957 Reviewed: 7/1957
ABSTRACT The present paper discusses the measurements of the spectra
mentioned above ocrried out in 1949 - 1952 by means of the
small magnetic spectrograph of the ALAG92 laboratory for
Cosmic Radiation. This device was described in detail already
in previous papers. The author here investigates the spectra
of unfiltered radiation consisting of eleatrons, mesons, aud
protons and the spectra of hard components from which the
electrons were eliminated. The paper is divided into the
following chapters:
1. The bpectra of the unfiltered radiatioL, the absorption
of the positive surplust 3. The spectrum of the hard
components, 4. The intensity of the proton components.
CARD 1/3

Pi - 2951
The Spectra of the Momenta of Cosmic Radiation and the
Positive Surplus within the Interval (011 - 2~5) 109 eV/0
in an Altitude of 3250 m.
SummarZ of results: From the typo Qf the spectra of unfiltered
radiation it follows that in an ailltude of 3250 m, besides
electron- and mason oomponentay also proton components exist
in noticable quantities. This manifesto itself in a positive
surplus of the total radiation of IOAQ + 0 02.
In the case of momenta of more 7
-than 8VIO eV/c the positive
surplus depends only little upon the momentum, and its amount
is near 1,5-
Within the domain of small momenta of the spectrum of non-
filtered radiation the positive surplus is nearly eq URI to 1.
Within the average momentum domain of from. 2 to 8,109 eV/0
the positive surplus rapidly increase attains its maximum
value, which Is near to 2, at k 0 eV/c, and is again
reduced to 10. The high positive ourplus within this domain
in explained by the existence of a considerable number of
protons. The influence exercised by the protons on the amount
of the positive surplus-manifesto itoolf in the spectrum of
the hard components. Within this spectral domtin a purely
CARD 2/3 usesonia positive surplus of 1.25 .1 OvO6 could be determined.

PA - 2951
The Spectra of the Momenta of Cosmio Radiation and the
Positive Surplus within the Interval (0,1 - 2a5) 109 eV/0
in an Altitude fo 3250 m.
If the positive surplus of the mason components is known,
the number of protons within the investigated momentum
intery&1 of (3,4 - 25)-108 ev/0 *an be estimated. This
number amounts to from 13 to 17% of the total intensity of
the hard components.
(4 illustrations aud 2 Tableso)
ASSOCIATION: not given.
PRESENTED BY: -
SUBMITTED: 6. 10. 1956.
AVAILABLE: Libyary of Congress.
CARD 3/3

ALITHOR VAY5ENBMG~ A .0. S,',!1RFITSY,1Yj V.A. 56-1!-I~/52
TNLE i I i e I L_eeay of a Tritium Hyperfragment.
(-1Tezcrzwy raspad tritiyevogo giperoskolka -Russi&n)
PEkIODICAL Zhurnal Lksperim. i Teoret.Fiziki,1957,Vol 32,N;: 4,PP 716-737(USSR)
A3STRACT During the systematic examination of Ilford G-5 emulsion layers
(exposed to radiation in an emulsion chamber for eight hours in an
altitude of 25 km in Italy in the fall of 1955) put at their djLs-
posal by Prof.Powell,the authors of the paper under review disco-
vered a mesonic decay of a tritium hyperfragment,with a negative
pion being retarded in the emulsion.This case is being mentioned in
the paper under review for the purpose of supplementing the relevant
statistical data.From the primary star of the type 10+0n(reprodu-
ced in the paper under review) a slow simply chareed particle hf is
emitted.This particle is stopped in the same layer and it forms a
secondary star with three rays.The range of hf amounts to 36o/Aand
on basis of the rqnge) is larger than the mass of the proton.Also
the estimate on basis of scattering and range yields a value that
is larger than the proton mass.The charge of hf, as determined on
basis of the number of interruptionuton basis of the ranje,and on
basis of the thickness of the trace,equals l.At the secondary star
two particles with short ranges have equal ranges,namely 12+0.6/A--
The estimate of the charge yields z.I.Trace 3 belongs to a nega-
tiva pion with the range of 15,700/,~,.Thidnegativc- pion penetrated
Card 1/2 eight layers of emulsion and prodaced at the end of its range a

AUTWR' V,%I&WABERGV A.O.p SMIRN11-j&l1p V.A.
TITLB Ijivestl HIZF-Z CorrelatLins in ti -+ ~L -+ e - Decays
(Issledovaniys korrelyatsiy pri ff -op -+ a raspadakh. Russian)
MRIODICAL Zb=al Eksperim. i Teoret. Fiziki, 1957, Vol 32, Nr 6.. pp, 1340 - 1343
USTRACT In the present paper the energies resulting from the Tr+ -+ A+ -+ 0+- decay
in a photoemulsion are measured of the positrow and the ingles between
the flying-off direction of the positrons and myons. The authors up to
now investigated 2334 Tf -P--acts of decay which were, observed on the occa
sion of the ayatematicalinspection of the part of the emulsion chamber
recorded by Profs POWELL This emulsion chamber was'irradiated at a
height of 28 ka.
The traces of the positrons and myons enclose with the emulsion plane
only small angles. It is therefore possible# without committing gravt
errors, to refer the correlation to particleaj the traces of which are
located in the emulsion planes The spectrum measured here of the posi-
trons produced on the occasion of the decay is shown in a diagrams In
this spectrum the particles with an energy of more than 40 MeV are in-
vestigated$ the emirision direction of which includes small angles to-
gether with the flying-off direction of the qrono The corresponding data
are shown in a table. The front-rear aswumetry in the case of small
Card 1/2 angles is extraordinarily high, but dec~,eases in the case of a decrease

Investigation of Correlations in Tr -i-ju -* e - Decays 56-6-3.1/56
of the angular aperture. The amount of this asymmetry agrees well with
its theoretical value. When taking account of all argles (o - go 0 and,
90 - 180 0) the asymmetry effects decrease but are still easily observ-
able. From a diagram shown hire the following conclusions are drawn**
1.) Towards the front 54 positrons7.were emitted;,, and 66 towards the raars
2.) The share of the positrons flyingIff in the rear direction increases
considerably at an increase of the energies from 25 to 40 MeV-
3.) From the particles with an energy of more than 55 MeV9 9 flow off
in tha rear direction and only 2 in the frontal direction.
In conclusion the data obtained here are compared with a theoretical
curves Attention is dr&~dn in short to the differences (apparently con-
nected with the depolarization) between experiment and theory, (With
2 illustrations and 1 table)e
ASSOCIATION AcadeW of Science of the U*S.S.R.
(Akadomiya Nlauk SSSR)
PRESENTED BY
SUBMITTED 19.3.1957
AVAILABIZ Library of Congress
Card 2/2

AUTHORS Vaysenberg A.O.,SmirnitskiyV.A. 56-3-12/59
TITLE _fk_'*~er~=*~d*nce of the Angular Correlation of the X+I&
]Decay. 0+-raspad* ot *ntrgii
(Zavisimost' uglovoy korrelyataii pri N+
- Russian)
PERIODICAI- Zhurnal Eksperim-iTeoret.FiAti, 1957,vol 33,Nr 3,pp 621-624 (USSR)
ABSTRACT The energy of the positrons and the angle between the positron di-
rection and the A -meaotron from 58o disintegrations in the emul-
sions NIKFI -H and Ilford G-5 were measured. For the oorrelation
coefficient k the following values were measu d
Energy 6-0-0 >E -A/2 Energy C-0 a Y-> F_ - A/ 2
0 -(0,053�01033 0,6 '8+ 0)
0,1 -0,o53i0,03 0,7 :(00:14C+00:0015
012 -(O:*052+0,o33 ~0,8 -10,15~�0,051j
OP3 -~O 06470,034 0,9 - 0,192+U,059
0,4 - O,o6o-+O,035 1,0 - 0,200+0,074
0,5 - 0,08310t037 1 1,1 - 0,2o6+0,104
The value A which increases with increasing positkon onxgy agrees
with the forecasting of the two component - neutrino th*ory.
There are 2 tablos, 3 figures and 1 Slavic reference.
SUBMITTED June 10,1957
ATAI-TABLE library of Congress.
Gard 1/1

24(5)
AUTHORS: S.~--,-Jrnitskiy, V. A.
9 j*1 '15-3-13/61
Kolgariova, E. D., Minervina, Z. V., Pesatskaya, Ye.
Rabin, 161. V.
TITLE: Angul~r Correlations for Ponitron.,, of Low Ener-111 -Irl
7E +-e+ Decay (U-1ovaya korrelyatsiya dlya pozitronov :-Lloy
energii pri n+-11+-e+-raspade)
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy 'Liziki, 19f:6,
Vol 35, Nr 3, pp 6,15 - 648 (USSR)
ABSIRACT: After the discovery of the nonconseivation of parity
with vie-~k interaction, several groups of research sciertists
investi-:1ted the energy dependence of the ~~nr,-uiar co=elqtion
Of Positrons in n+-A+-e+ decay (Refs 1-3); accoruing
to llukhin, Ozerov and Pontekorvo (Ref 4) the connection
between asymmetry and enerCy corresponds to the laws
of the two-componeLt theory, accordin[,; to which the
formula N
Cos a?~ 2& -1 applies, where *-denotes the angle
Card 1/4 3 3 - 26

Angular Corrnlation3 for Fasitrons of Law Energy in SOY/56-35-3-13/61
between the di--ection of myon spin and the direction
of the emission of the pofitron in V+-e+ decay. IL
denotes the enerb-y of positrons in units of its
mamimum energy, X-a p.%rameter of the theory (i7bich
is determined from the r_--tic between interaction con-
stants), a - a coefficient wn4ch shows what uart
of m-yons is rol-arized 4he iz,istant of decay'. In the
present paper the correlation was not investiEated in
space, tut in the plane, so that the formula used here
for Cos 8'is distinjuis'-..ed from (1) by the fact t-,~.t
the first factor of the rioht side is aX/2. A photo-
emulsion plate 'XM-R-- of 400P thickness vas used 1'cr
the investiC-,-_t_Jons,' it vias exposed to -1 7,.+-meson beam
of the synchrocyclotron of the OIYaI (O*edinennyy J-nstitut
yadernykh issledovaniy = United Institute for Miclear
Research) (cf. also reference 2). Ile-zLIts are, ezSe_nt_J,--_1_1y,
Elven in t-.,,o tr-.bles6L
Card 2/4 1) Series of measure-ents, 109--1, paSizron traces:

An,-ular Correlations foz Pos--!trono of Low Ener,-, in SOII//56-75-3-13/61
I,+- 9+-e+ Decay
0 E: 0-0,3 0,3-0,6 3,6-o,9 o,9
0-180 number of 46 333 440 280
parlicles n
cost+- 0,7/rn 0,18+0,10 0,00+0,04 -0,05�0,03 -O,CL+0,04
0 - 600 n 34 231 300 198
120-180'~-o-s~+0,85/rnlO,31~+-0,15 o,oo+o,o6 -o,o6+o,05 -o,16+o,c6
2.Series of measure-ments,8000 n+-g+-e+ decay events, of
,7hich 200 withe< 0,3
F- :0-0, 3 0,3-0,6
0-180 0 n 201 499
Cos 0,07�0,05 0,01+0,03
o - 6o0 n 141 3377
120-1800 'cos 0'1~-+0,07 0,01+0,05
(8-is the angle -oetween the direction of emissio-n of the
myon and that of the positron). Similar measurements
have recently been cgrried out by Pershin et al (Ref 7)
in the pronane-bubble-chamber. The authors in conclu3ion
Card 3/4 thank A.I.Alikharlov for his interest in this worl:

Anbgular Correlations for Pos-itrons of Low Enerj-.Zr in SOV/56- 3 5-3)- 13/61
n+-p +-e+ Decay
and A.2.Birzgal for calculations. Moreover, they
express their gratitude to the collaborators of the
testing group for evaluating -- large number of plates.
There are 2 tables and 7 references, 5 of which are Soviet.
SUBMITTED: May 31, 191-8
Card 4/4

21(8)
AUTHORS: Yaysenborg, A. O_, 3.-airnizskiy, 71 L. 50T/56-36-1--56/62
TITLE: The Decay of a Beryllium Hyperfragment (Raspad berilliyevogo
giperoskolka)
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fizikij 19599
Vol 36, Nr 1, PP 333-335 (USSR~
ABSTRACT: By systematical scanning of layers of the emulsion Ilford G-5
irradiated in an altitude of -25 km, the authors detected a
non-meaon-decay of a beryllium hyperfragment whik~h permits
relatively precise measurement of the binding energy 6f the
Ao-partiole. A slow hyperfragment is emitted from a primary
star of the type 12 + 4P. It is stopped in the same layer and
causes a secondary three-ray star. The range of the hyperfrag-
ment amounts to 60 ~t . An estimation of the charge by comparirg
tha thickness of the hyperfragment trac,'~ with the thickness of
the tracks of the Be 8 hypey-:ragments and, of oc -particles (which
were produced in -the'd.---y of Be givds Z - 4. Analogous
A.
-re carr.ed ou,, for Vie o' er tracks. The authors
estimations we,

Card 1/2 8 4
suggest the decay sc!,eme Be ---), He + d + p + n +

The Decay of a Beryllium flyperfragment
FOV/56-36-1-56/62
(160.0 + 1.3)9ev. For the binding energy of Ao in the
87
nucleus Be the value BZt - (8.2 + 1.6)Mev is found. The values
measured of B.,)! for tAe hitherto known decays of )!Be8 are
equal to 3.7 3; 0 + 5; 9.3 or 6.6 (depending on the decay
schei?); 5.9 0.5 (meson decay). The 3 schemes * Be9--~,-He5+
r IK 8 3 3 YV $f 9
+ d + p + n + ; g Be -P He . + H. + p + it + Q ; if B 0
--o' Ue4 + E3 + p+ n + Q can 'ie excluded since they give high
negativo values of BM . Fhe decay schemes with several neutral
particles cannot be exolu(~ed from being considered, but they
are less probable. There are I figure and 7 references, 1 of
which is Soviet,
SUBMITTED: October 8, 1958
Card 2/2

21(l) Sov/-6-36-4-8/70
AUTHOR: Vaysenberg, A. 0.

TITLE: + -rony maloy
Positrons of Low Energy in /.4 e Decay(Pozit
energii pri 116+ - e+ -raspade,
PERIODICAL: Zhurnal eksperimentallnoy,i ieoreticheskoy fiziki, 1959,
Vol 36, Nr 4~ pp 1019-1021 (USSR)
ABSTRACT: In the course of an inveRtigation of the anisotropy of the
flying-off of positrons in n+ - IA;' - e+ -decay (Refs 1,2) it
was found that within the range of low positron energies
(:~~20 Mev) the ot-e-correlation is somewhat greater than might
be expected according to the two-component neutrino theory
(Ref 3). Investigation of positron distribution within the
first spectral-range is therefore of interest. The author
analyzed a'number of positron spectra and, with the aid of
all data available, he calculated the Michel parameter q. In
reftrence 1-11100 positron spectra had been investigated, in
reference 4 - 405, in references 5,6,7,8 - 1161, and in ref-
erence 9 - 286, so that the author had a total of 2952 positron
observations available (see table). For the positron spectrum
Card 1/2 in the case of four-fermion interaction it holds that

SO-7/5 6 -7; 6 -4- a/ 70
Pocitrona of Lovi Energy in 1~1, -Decay
2
P(-;)d-- -4E r3(1-,~) + 2Q (A8 -1)] dE~~, = positron energy); if
1- 3
Q is between 0 and 0-75, the corresponding number of low-
energy particles is Z
P(_'-)4j ('-S 0.3 - 0-4). After integraticon
one obtains Q = 3(4-3t~ the numerical
calculation in consideration of the statistical error gives
Q = 0.72 + 0.10; this value agrees with the two-component
neutrino theory in that the latter gives the value Q = 0.75
7~ithout relative correc-..Ion. There are 1 figure, 1 table,
and 10 references, 3 of which are Soviet.
SUBMITTI
Card 212

21(7) SOV/56-36-6-8/66
AUTffORSs Vaysenbera, A. 0., Rabin, N. V., Smirnitskiy, V. A.
TITLEs The Depolarization of~t'-Mesons in Nuclear Emulsions (Depolyari-
zatsiya +-mezonov v yadernoy emultaii)
PERIODICAL: Zhurnal eksperimentallnoy i -ceoretichoskoy fiziki, 1959,
Vol 56, Nr 6, pp 168o - iva6 (ussR)
ABSTRACTi The present paper intends to determine exact values of the
asymmetry coefficients in the spatial distribution of posi-
trons from the reaction n+ - u+ - e+ in nuclear emulsions;
the author carried out a comparative investigation of ordinary
and double-diluted NIKFI-R-emulsions as well as Ilford G-5;
among other things, they investigated 9101 A+-)t+-e+- decays
in NIKFI-R emulsions;irradiaticn was carried out on the sin-
chrocyclotron of the ClYaI (Joint Institute of Nuclear Research).
The following decays were selected for investigation: 1) such
having an electron trace length of >t1 mm, 2) with a distance
of the vertex of the decay from the emulsion surface of the
glass >100)v . Table I shows the angular distribution of the
measured decays for 0p++e+-raspade)
PERIODICAL: Zhurnal eksperimantallnoy i teoreticheskoy fiziki, 19591 Vol 37,
lir 1, pp 326 - 328 (USSR)
A13STRACT: The preEant "Letter to the Editor" is a continuation of a num-
ber of other works (Refs 1-3). The asymmetry coefficient a of
this react;*~on weuL determined according to -,he equation dN =
= (1+acos~)))df2(,t'Pangle between the direction of the departure
of muon and electron, d 0- solid angle element) as amounting to
0-077�0.012 for NIKFI-R emulsions; a increases to 0.28+0.0? if
the emulsion is located in a magnetic field of 17 kG. Yhe data
are mean values obtained by measurements of the entire spec-
trum. Investigations of the energy dependence of a were car-
ried out by means of a NIKFI-R photoemulsion pile In the per-
pendicular magnetic field of 17 kG; irradiation was carried out
Card 1/3 on the synchrocyclotron of the 0IYaI (Joint Institute of Nuclear

The Energy Dependence of the Spa,.-ial Asymnetry of SOY/56-/17- 1 -6 3/64
Positrons in x4p -)0 Decay
Research). Positron energy was measu.79d by means of the method
of multiple 'scattering, for which purpose the microscopes
Kornitaka IIS-2 and MBI-9 were used. Part of the meazurements
was carried jut by means of a semiautomatic devioe, 565 traces
were selected according to certair criteria, which are enumer-
ated Under these eonditions it holds that a(F-) - 11,27 Nf Xb
(1.2; 2_a2 I Nf+Nb
~~ ~Eg where N fdenotes the number of fc:r.,ward decays,
V N~~b~
Nb the number of backward deoays. The N. and Rb are given in a
table for 10 energy intervals between 0 and 1.1. A diagram
shows the dependence of a (C-) on the positron onergy F_-. The drawn-
in curve represents a~6~ according to the theory of the two-
component neutrino: a r-, = 3-0.28(1-2E)/(2g-3); (here 0.2,3.;.G.02
is the value of the asymmotry coefficient at 17 kG). The d7otted
curves show the energy dependence of a obtained from the sta-
tistical errors of energy measurement and from the bremsstrah-
Card 2/3 lung in expe-rimental conditions (upper curve: 10% dispersion

The Energy Dependence of the Spatial Asymmetry of S07/56-37-1-63/64
Positrons in Decay
and 4 mm track length, lowor curve: 20% dispersion and I mm
track length). The differential spectrum of a(6) obtained ex-
presses the rapid growth with energy and agrees with the two-
component neutrino theory. In an earlier paper (Ref 2) the au-
thors also worked with NIKFI-R photoemulsions (a . - 0.077 �
0.0'12)9 and within the energy range of 0 - 0-3 they obtained
the average value of a - + 0-14 � 0.10. (In the case of the
measurements published, the measured a-values are all within
the positive range, and the theoretical curves intersect the
6-axis at about 0-4 - O.r)~ The authors finally thank Z. V,
MinGrvin and Ye. A. Pesotskaya, and D. M. Samoylovich and
B. A.. Nikollskly for taking part in the experimenta. There are
I figure, 1 table, and 3 Soviet references.
SUBMITTED: May 7, 1959
Card 3/3

21 (1)
AUTHOR: Vaysenberg, A. 0. 507/56-37-2-43/56
TITLE: The Spatial Asymmetry for Low-energy Positrons in the
n+_ P+_ e+_ Decay
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, 1959,
Vol 37, Nr 20), PP 566-567 (USSR)
A.BSTRACT: This investigation has been made with the aim of studying -
the totality of the data on the asymmetry of the spatial,
distribution of positrons in the n+- ji+- e+- decay, found in
the author's laboratory and elsewhere in literature. Special
attention was paid to the asymmetry coefficient ao ave-raged
over the spectrum fromF_- 0 to the energy F. The following
measurements were carried out in the author's laboratomy:
1) Measurements of the total spectrum of 1102 particles with
a - 0-077. 2) Measurements of the spectrum of the slow electrons)
345 particles having been 3eparatedfor a F- 0.077 with an
energy F_ /_ 0.6. 3) Measurements of the total spectrum of 565
positrons for a - 0.28. The measurements 1) and 2) were carried
Card 1/3 out with a normal NIKFI-R-emulsion, the measurements 3).-,71th

The Spatial Asymmetry for Low-energy Positrona 3OV/56-37-2-43/56
in the n P+_ e+_ Decay
the same emulsion, but in a field of 17000 gauss. It is
convenient to express the experimental data through the
difference of the positrona emitted forward and backward:
6 - (N forward - Nbackward) /(Hforward + 17backward ).' In a
table the values of N forward and N backward for the energy
interval 0 to 0-3, 0.3 - 0.6; o.6 - o.s; 0.8 - 1.0 and ~ 1.0
and the values of S in these intervals are given. According
to this information the as~rmmetry decreases sharply in the
transition from the edge of the spectrum to smal' :iergies
and vanishes almost completely at L< 0-5. The st&-~jatical
accuracy of the results in the range of small energies is
markedly increased, if not only these data, but all other data
known on the asymmetry at small energies (determined by means
of photoemulsions)are taken into account. They are compiled in
a second-table,.6 equals zero in the interval 0 to 0.6.1he
values of 4 observed are not at variance with the values
derived from the two-component theory. The asymmetry at low
Card 2/3 energies has also been measurect by means,of a magnetic .-

The Spatial Asymmetry for Low-energy Positrons SOV/56-37-2-43/56
in the n+ - 4 +_e+_ Decay
spectrometer (Ref 9). The results due to this method are in
agreement with those given in this paper. There are 1 figure,
2 tables, and 9 references, 4 of which are Soviet.
SUBMITTED: May 7, 1959
Card 3/3

ovse, KUZT-,,)V I V.D. , redo; VIRF)) 1. G. ,
VjAXSEN13ERGY Aleksandr __.fev,-;ch;
red.
1114auka," 1964.
moskval lzd-vo
. [1-ju-mesons] Miu - ulezon' (MIRA 17:7)
399 P -

MUKHTN~ KonstantJn prof.,
retsenz(~nt; KAL-YUMTAY.A., T.P.., rod.
[Introduction to mclear phy2icsi Vvedenie v iadernuiu
fiziku. Izd.2., perer. i dop. Moskva, Atomizdat, 1965.
720 p. (YI-RA.18:9)

VAYSENBERG, AA; KOLGANOVA, E.D.; RABTN, N.V.
Disintegration of' photop-mmlsimn rvic-lel-
fiz. I no.4g652-658 Ap 1613. (141RA M 5)
1. Institut te-oreticheskoy i eksiperim-entallnoy fJ.ziki Gosudarstven-
nogo komiteta po ispoltzowmiyu atoranoy energii SSSR.

+
TITLE Muon nolarization"an'd tbe ratio of form fac'-ors in rz d6cay
V3
4
_ZhurnA C
------------
no.
TOPIC TAGS: muon, K meson, meson polarization
A-BSTRACT 'Mis worR is a cont-
rp_-2~0 coup i Ute
ar nq theoretical aid experimental values of the
probability ratio for K,,,, and K ,de::ay s, the _&tj_t_'_1orS Mea-ure-d --he
e.7
+
ar istribution of positrons four 887 positive muons from K
~0
The mcn-as-
Aecay4 as well as thd [L -meson longitudinal polarization.
Card 1/2

lurements were made with a pellicle staC11-1 having a volume of' about 1
14 ter of type R emulsion. T-he- chamber was .rradiated in t1he pr-D-ton.
synchrotrolri of Inst-3. Ll,u, llectrettiLches'X-oy i eksperi-mental'noy fiz-'k-1
(Tnstitute of Theorct.-I.cal and Exr)Prim.~,nf-:41 a
iLud-,Iriai muon polar.Lzaui-on was +U.68 0.28, indicatina the form. f ac-
tor ratio is 0 + 1. "Thc~ aut-T-r-
ASSOCIATION: Mone
-SUBMITTLED.- , 26jan,6.5 EUCL: 00
SOVz 004 OTHER: 007
2/2
SUB CODE: rip

VAYSEN-PIER-1, A,O.~ KOL'.3.',NOVA, F,1,1,~
Meunu-rl~ng tlrio ma!~2iis of cna,-gf-.j part'Isle's V~'h a
tf~kh- ek~,p. 9
j-",-Ag '640 kmf-?v--

W7/094/127-t-
~-TOP --d -TiMGS--.-
_P
,kBST RACT; 7,r, 1 -5 r, a t io n ofF e a ri e I- wo rk (Phys. Let. V. 2,
card
112, 1196-2) cind a-5 at mc)y-- ai-curate data or, tlhe yields
3 'Mie work wds done
Charged pazt,.cle
1/3

-- re~
_j. e
11 -for, e e S-
-i-i close to: e ies
an la, sjjjA
rg
f rom heavy nucle _A0%_ d-
than 20 MeV. Absorption of fast Regative pions does not raix~lt n
-r.,TD!ex partic' s. A corrparison of the re-
the virtual parti-c-le ~'h
i- T FC_vLi~r ~, t- uss 0 Oriq.
~)(X tot ard a dis(- i n.'
fimiree,
ASSOCIATION: None
R
11ONPAW

L 13496-6.0
ACCESS1014 NR: V4047893
utj
Card
IMS

VAYSENBERGO A.0.
*.U= -a-, 1740
go of mesons and electrons in studying the Internal =,clear
structure. Dos. such. fiz. no.5:105~-115 057. (MIRA 16s6)
(Rucleii AtooIC)

ALIMITYAN, A.I.; VAYSEMBERG., A.0.
Recent experimental data on r menuis. Izv. A-H SSSR. Ser. fiz. 26
no.6:698-710 A 162. (MIRA 15:6)
(14esons)

VAYSENBEiL, A.O.; MOTSKAYA, Ye.A.; SMIRNITSKIY, V.A.
Electron spectra emitted In the decay of negative '~LmesonB in a
C.
nuclear emttlsion. Zhuroekspai teor*fiz. 41 no.4:1031-1036 0 161.
NERA 14:10)
(Mesons-Decay) (Photography, Particle track)

S10481621026100610011020
W25/Bli2
AUTHORS: Alikhanyan, A. I., and Vayeenberg, A. 0.
TITLEs -New,ex erimental data on pmesons
P
PERIODICALs Akademiya-nauk SSSR. Izvestiya. Seriya fizicheakayal v. 26,
no. 6, 1962, 698 - 710
TEXTt This is a survey of the experimental data published from 1946 to
1961 relating to electromagnetic interactions of muons (production of meson
pairs by photons, scattering of high-energy muons from nucleit measurement,
of the magnetic moment of a meson) and to the weak interactions of the
muons Itotal probability of the muon-electronkdoesyt asymmetry spectrum in L,/
the ~L-4e + V~ + V decay, iftuon polarization ai the time of x -decayq
11spirality" of the particles produced in the' decay A_-qe + v + 9). There
are 8 figures. The most important English-language reference iss R. Peyn-.
man, X. Gell-Mann, Phys. Rev., 1099 193 (1958)-
Card 1/1.

VAYSENBERG., A.O.; K01.13ANOVA, E.D.; RkBINO:-N.V.~ PESOTSKAYA, Ye.A.
Ionization measurement in photoexulsions of type P. Prib. i
tekh. eksp. 6 no.2:557-59 Mr-Ap 161. (MIRA 14:9)
(Ionization) (Photographic emulsions)

VAYSENBERG, A.O.; SMIRNITSKIY., V~A.
Semiautomatic unit for measuring multiple scattering. PribA
tekh.eksp. 6 no.5:44,,47 S-0 161. (MLRA 14:10)
(Particles (Nuclear physics)--Scattering-14easurement)

VAYSENBFM A 0 . KOIGARWAY- E.D.; MIMVIRL, Z.V.
-1
Angular distribution of # -xaeBons in T/ -/,t -decay. Zhur.eksp~i
teor.fiz. 43- no.l.-106-108 .11 161. 09RA 14:7)
1. Inatitut teoreticheskoy i eksperimentallnoy fiziki AN SSSR.
(Mesons) (Fhotography., Particle track)

VAYSEMRG, A 0'
Capture of A - _MeSons-in carbon accozpanied by B12* formation.
Zhur.eksp.i teor.fiz. 41 no,.1:lG9-1L?_ Jl 161. OMA 14:7)
1. Institut teoreticheskoy i eksperJnantaLlnoy fiziki AN SSSR.
(Mesons-Capture) (Boron-lsotope6)
(Photography, Particle track)

VAYSENBERG., A. 0.
Determining the energy of hyperfine splitting in the I a state
of mwnium. Zhur.ekap.i teor.fiz. 41 no.3:853-855 8 161.
(ICU 14:10)
1. Institut teoreticheskoy i eksperimeritaltnoy fiziki AN SSSR.
(Mesons)

~ - KCLGANCVAj. E.D.
VX[SENBERGV A.O.i SMIRNITSKIY, V.P -I
try resulting
Study of the electrein spectrum and asylroe ~ ).
ear PhOtOemulsion. Zhur. eksl
~V'_A_ e-decaY in a nuc, 161.
fiz. 40 no.4:1042-1049 AP ctrons)
(Mesons--Decay) (Ele
from
I teor.
wpu 14:7)

VAYIS)ENBERG, A.O.; KOIJ.ANOVA, E.D.; SMIRRITSKIY, V.A.
Stud,ying asymmetry in the decay of negative /.4--masons in a nuclear
emulsion. Zhur.eksp.i teor.fiz 39 no.5:1198~-1200 N 160.
1
(HM 14:4)
(Mesons-Decay) (Photography, Particle track)

VAYSETBERG A,JD.; SMIMUTSKIY. V.A.
Asymmetry of V-fW4- Cf. decay in a zagnetic fi3ld. Zhur. eksp.
i teor, fiz. 39 no.2:242-248 Ag 160. (MIRA 13:9)
(mesons-Decay) (Magnetic fields)

AUTHOR: Veysenberg, A. 0. 8/053/60/070/03/002/007
Boo6/BO14
\111
TITLE: -
New Experimental Data on the Decays of n- and g-Mesona
PERIODICAL: Uspekhi fizicheakikh nauk, 1960t Vol 70, Nr 3, PP 429-487 (USSR)

ABSTRACT: a of
The present paper gives a survey of experimental resull
investigations concerning the properties of free pions\'und
muons.lNit is based on publications of the last two years, viz.
-
primarily articles of Western periodicals. The author first
describes the problem and discuBses'the fundamental publica-
tions by Lee and Yang, Feinman and Gell-Mann, dealing with
the decay of muons'and pions. The second section is devoted
to the mass and lifetime of n- and p-mesons. The latest data
on mass (Refs 15-18) ar~e compiled in a table, The individual
lifetimes are mentioned. The value obtained for the p+-Meson
slightly differs depending on whether it was determined by
experiments on cosmic rays or by means of accelerators
- (2-56 + O.C5).10-8 see
(2.22 or 2.21 + 0.02 psec); T
+
and r (5-0 16).10-15 see. TIn the third s,iction the a th
card 1/3 0 -2
7~'

Now Experimental Data on the Decays of a- and S/053/60/070/03/002/007
IL-Mesons B006/BO14
discusses thQ electron spectrum obtained from the n-g-e decay
as well as the asymmetry of spatial electron distribution
(theoretical electron spectrum and electron angular distribu-
tion; electron spectrum ofthe V-e decay and-determination of
the Michel (Mishell) parameter Q by the photoemulsion method,
by means of a chamber located In a magnetic field, and a mag-
netic spectrometer; asymmetry of the spatial distribution of
electrons from the x --* g ---.*,e decay; experiments on electrons
by means of counters and magnetic spectrometerso experiments
by the photoemulsion method; asymmetry of the spatial distri-
bution of positrons within the range of small energies). The
fourth section deals with the chirality of leptons and with
the law of conservation of the lepton charge, and the fifth
section with the magnetic moment ol the muon. The sixth sec-
tion is devoted to the electronic pion decay and to the search
Jbr radiative pion- and muon decays (n --o- e + V deoayl radiative
beta decay of the pion; search for g --* e + y decays). The
seventh section gives results of experimental investigations
of muon depolarization (measurement of the asymmetry coeffic* Fit~;
CaA 2/3

New Experimental Data on the Decays of n- and S/05 60/070/03/002/007
p-Mesons B006YE014
of various substances; the spin relaxation time of v+-mesons;
the asymmetry coefficient in-photoemulsions; the asymmetry
coefficient in a dilute emulsion (NIKFI-R); kinematic de-
polarization of g+-mesons; depolarization of g+-mesons in
matterl attempts to detect the muon triplet state; polariza-
tion conservation by means of a magnetic field; the true values
of the asymmetry coefficient; depolarization of p--mesons).
The following Soviet authors are mentioned: Landau, Okun',
0. B. Zhdanov, A. A. Khaydarov, V. P. Kuznetsov, A. I. Mukhin,
Ye. B. Ozerov, B. Pontekorvo, Smirnitskiyt Babayan, V. G. Vaks,
B. L. Ioffej Meshkovskiy, Gurevich, Ivanov, P. L. Kapitsa,
Zelldovich, and Gershteyn. There are 38 figures, 10 tab
and 144 references, 32 of which are Soviet. lz~
Card 3/3

86890
S/05 60/039/005.100-4/051,
B029YB077
AUTHORS: Vaysenbe Kolganova2 E. D., Smirnitskiy, V. A,
U=="kood
TITLE: Study of the Asymmetry in the Decay of Negative Muons in
a Nuclear Emulsion
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, 1960,
Vol- 39, No- 501), PP- 1198 - 1200
TEXT: P. M. Shmushkevich (R-ef.2) and V. A. DzhrbaAhvan (Ref-3) showed
that negative muons lose most of their polarization in mesic atoms durin~J
cascade transitions. This agrees with experimental values of
A. E. Ignatenko et al. (hef-4). The authors determined the coefficient
of asymmetry of the p e decay in a nuclear emulsion without a mag-
netic field (H /,0.1 oe) and in a strong magnetic field (H - 11 koe)
parallel to the negative muon beam. Emulsion films of the type HAK&W-P
(IIIKFI-R) were bombarded with a negative muon beam in the synchrocyclo-
tron of OIYal (Joint- Institute of Nuclear Research). The initial pola-
rization of the negative muons probably does not differ eonsiderably
from the polarization of the positive muinsp which according to
Card 1/3

86890
study of the Asymmetry in the Decay of S/056/60/039/005/004/051
I
N
egative Muons in a Nuclear Emulsion B029/BO77
A. I. Mukhin, Ye, B. OzerOv. and B. Pontekorvo (Ref-5), is 0-81 + U-11-
The distribution of decay ele-.trons with respect to the direction of the
negative muon beam is describfid by a relation of the form 1 + acos"L%
The authors observed a total of 9279 decays without applying a magnetic
field, and 3403 decays in a magnetic field of 11 koe. Conditions and
results of measurements are given in the following table:
Magnetic field strength H < 10-'oe 11 koe
backward 4560 1707
Number of decays
forward 4699 1696
Coefficient of asymmetry +0.02 + 0.017 0.00 + 0.025
Number of observers T 1~
Consistency 12- 8 ~2 -25
Within the limits of the statistical error there is no noticeable
asymmetry, and the magnetic field has no influence on the asymmetry,
either. The negative muons are slowed down by the light (C,N,O) and
heavy components (Ag,Br) of the emulsion with about the same frequency.
Card 2/3

86890
Study of the Asymmetry in the Decay of S/056160/039/005/004/051
Negative Muons in a Nuclear Emuleion B029/BO77
There is fairly good agreement between the results of several observers,
especially for H = 0. Further measurements did not establish a notice-
able asymmetry either. For H - 11 koe, a - 2 cosA � 1-57/IN- increases
slightly at the end Of the spectrum. There is practically no asymmetry
in the decay of negative muons in a nuclear emulsion of the type NIKPI-R~
independently of the external magnetic field. Thus, it is impossible to
use the method of photoemulsions when observing such secondary effects
which are related to the polarization of negative muons, such as the
asymmetric emission of protonR in stare which appear during the absorp-
tion of ne?,-atlve muons by a nucleus, and also the asymmetric depart--ire
of electrons from 0 active recoil nuclei which are created by such an
absoxption. The authors thank N, V. Rabin and Ye. A. Pesotskaya for
as3isting in the measurements. Tnere are 1 figureg.1 table, and 7 ref-
erences: 5 Soviet, 1 US, and I Dutch.
SUBMITTEM May,. 289 1960
Card 3/3