SCIENTIFIC ABSTRACT ORLOV, YU.V. - ORLOVA, A.A.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001238220015-7
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: January 3, 2017
• Document Release Date: June 21, 2000
• Sequence Number: 15
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT


AUTHOR: ORLOV,YU.V. ?A - 2029
ft,-TITLE; The In ror Bremastrahlung in the Case of an Electric
Monopole-Like 0* --~ 0+ -Transition of a Nucleus.
-1-IBRIODICAL: Zhurnal Eksperimentallnoi i Teoret.Fiziki, 1956, Vol 31, Nr 6,
PP 1103-1105 (U-S-S-R-)
Received: I / 1957 Reviewed: 3 / 1957
ABSTRACT: The electric monopole-11ke transition from an excited 0* -
state to the ground state of the nucleus (which also has the
spin zero and positive symmetry) most probably develops to the
accompaniment of the production of conversion electrons of
electron-positron pairs. On this occasion it is possible that
both the conversion electrons and the components of the pair
emit ~ -quanta with continuous spectrum. The present work
brings the result of the relative probability of the interior
bremastrahlung which is +emitted by the components of the pair
on the occasion of an 0 ---~ 0* transition of the nucleus. Com-
putation is here carried out in BORN'S approximation and is
therefore applicable only to light nuclei.
At first a formula for the differential probability of the in-
terior bremestrahlung (which is emitted by a pair on the occasion
of an electric monopoly transition) is explicitly given, This
Card 1/3 expression is then integrated over the emission direction of all

The Interior Bremastrahlung In the Case of an Electric
Monopole-Like 0+ - 0+ - Transition of a Nucleus.
PA - 2029
particles (the nucleus is assumed to be infinitely heavy) and
over the energy of one of the components of the pair. The
formula for probability is symmetric with respect to electron
and positron. The formula obtained can be applied to the mo-
nopoly transitions at present known between the state with the
energy 7,68 MeV and the ground state (at C 12) as well EL84e_
tween the state with 6,06 MeV and the ground state (at 0 ). In
both cases transition develops mainly together with the emission
of electron-positron pairs. BORN 'S approximation used here for
computation is applicable because C12 and 0 16 are light nuclei
and the energies of transition are sufficiently high. Next, an
expression for the relative probability of the interior brems-
strahlung Is given. The numerical integration of this expression
permits the determination of the energy spectrum of the
f -quanta and the total relative probability of the proceosi
they are explicitly given for 0 16 and C 12'
The author further estimated the contribution made towards the
Card 2/3 continuous spectrum by the d^ -rays of that process in which

PA - 2029
The Interior Bromastrahlung in the Case of an Electric
Monopole-Like 0* 0 Transition of a Nucleus.
the energy of the transition 0* 0+ is used for the pro-
duction of a conversion electron and of a quantum. The quan-
tum is in this case emitted by the nucleus itself. As to be
expected, the part played by this process is very small, par-
ticularly within the domain of low energies of -quanta.
Its entire contribution is about 10 times as small as the con-
tribution made by the processes investigated by the present
work.
ASSOCIATION: Moscow State University
PRESENTED BY:
SUBMITTED:
AVAILABLE: Library of Congress.
Card 3/3

011~wv' Yu. V.
"On tl-.e Sum Rules f -r 7-. - ---:nucie~,r Crnszi Sec tien,"
Moscow State University.
:Iaper submitted at the A-U t~oiif. c iuclear ive-actions In :ed"~Ial and Low --ne g~,
Physics. 'loscow. 19-27 -zm 57.

I- (- CIV V.
AUTHORI Belkin, T.Y., Krupohitakii, ?.A.* 89-2"/36
Orlov, Yu. V.
TITLE Measuring Resonance Absorption of Neutrons in
Uttrogeneous U/b 20 systems.
(0b Ismersail resonansacgo pogloshchoulva neytronov Y

toregenzykh slatemak
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PERIODICAL
into a tank
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W eue uranium systems
o
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2 square
ABSTRACT lattloos with a a V,Os 6,3 and 394 on; uranium rod
dimeter 10751 161 and Oj568 cm) could be fitted* Desld*e,
a uranium converter of 0 a 3 out I a 10 on was fitted into
the center which was irradiated with slow A*utrans of the
Russian heavy water reactor. Indius foils, packed in
cadmium holders, were used as neutron detectors* The
coefficients a and A of the relation
- 41 - V - a ( Q 3/2 + AQ2) were determined
3

-
1/2
1/2
. The expression
at a a 4,4 on and A - 0,40 ozi
" 3p -2/3 for the uranium D 20 @yet*& is, measured by means
of this method, lower than In the a&@* of measuring by
CARD 1/2 other methods*

B)d;,

O'l. 0+ Nt;rLE4R TRANS11M)
-.k* Fbya ~JXT 4; 9444067yllaw
................
Tks r4sulti~qf cmp~l~tlmjl tho' relatlia prob,

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UWAIMp A. V. p CRDOVp Y. V. p TIXHOMOV, A. 5. 0 Tt]BOVTSV,, V. V. atd BRkMO, L S.
---------------
"I'a"YAde's OPt'que Pour "utOractiOu xv*c 108 nOYsuz des neutrons dlenergle
report proanted at the Intl. congregg for yulgar Intermtjous (11m Imorgy) and
NWIS&r Stnwturs (Iutl. MOD aW Applied Physlas) Paris, 7-12 July 1958.

LtMAWOV, A. V. , QRLOV, Yu. V. and TUROVTSEV, V. V.
Moscow State University, US.S.R.
"Optical Model of the Interaction Between Intermediate Energy Neutrons and
Nuclei," Nuclear Physics, v. 8,JPP. 325-337, (1958) (North-Holland Publishing
Co., Amsterdam)
Abstract: An optical model of the Nucleus Is investigated in which a complex
potential with a tail expressed by a third degree polynomial is employed. Parameters
of the model which give the best fit between the theoretical cross sections4eand&,
the experimental values for 14 MeV neutrons have been determined. The agreement is
quite satisfactory for nuclei heavier than the chromium nucleus. The elastic scattering
neutron angular distributions computed with dLid of these parameters also satisfactorily
agree with experiment. A preliminary investigation at lower energies indicated that
in a relatively broad range the parameters depend only weakly an the energy.

-1 E7nv.
4(
A JT Jk ,, I L,i k I y a no v rrjf~~v, V., Turovt.,4(-V. V. V.
- --------- --
TIT LE Optacal M-del for ttie Int-raction Between Neutrons ~l
energy ano Nuclei (Optir,)ie.9Kaya mooell d1ya vzaimndeystvi:,-.
,
r
nevtronov sredniKh energiy a yadrami)
P -"R I OD I C 1Zhurna I oksperimint a I I rroy i t enret icheskoy f iziki , 1 q- k4,
Vol Nr ~. T-p 6 1 .1 F!z R
4 B,;TR-' PT n their introuiction tne aathors discuss several. paperr a~-
ing witr, model representations of the interaction betweer.
nucleons Find nuclei, which have already been published
"Feshbach (Feshbakh), Porter, Weisskopf (Vayskopf'), ~Ref 1-:
ne'"tron-nucleus interaction, square well potential;
(Ref 4): low energy neutrons, optical model; Beyst,-r. Talt
(Uolt), Salmi (Selmi) (Ref ~,) investigated interactions a,
various energles up to 14 MeV . In the present paper an
nuclear model is investigated in which the nucIpup is descrio~d
by a complex potential; this potential has a tail of the shapr,
of' a polynomial of the third degree.
U(r) = V(r) + iW(r) 11 1 + i~)f(r) with
Card 1.3

SOV 1 ~,
Optical Model for, the Interaction Between NeArons oi 11(.-di~im Friprgy ar,;
1 2, 5 r4 R-d
f(r) 1 ~ (r-R-2d)(r-R-o) 4d R-d4 r