SCIENTIFIC ABSTRACT FR:BELYAYEV, D.K. TO:BELYAYEV, B.I.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000204600037-6
• Release Decision: RIF
• Original Classification: U
• Document Page Count: 99
• Document Creation Date: November 2, 2016
• Sequence Number: 37
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTR

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CU..1~/il~ .)~VV~ Q aI ar.ri~~r
~ 13e'~, and i,i, c.uich Y:ave; themsclvis bect~ f ormcd I.;ultipJa
nuclei, ;such as Ha , ~'
it~tcrrtct:ians o~ hi.f;h~~:.~rt~r~y t~uc~~ona~ '1'h~re rirC 1 f~.i.ruro ,lnc~ 1 tt~i,lt..
A,5UCIATIUNs Ub"yedinennyy inNtitut yaitci'nYkh :i.sslaaavnniy (Joint l.n:atitt=tL ~'~
of Nuclear RE~se~~rch)
~,UB~'IrT2'I';D s 1'aarch 31 , 1 X02
Tables Relative yiel~~s vrith Bt
rea~~rct to t~t211
Legends (1) Target; (2) bom-
bardi.n~; particle end its
energy in i~r;ev. pb
p, 6G0 0,81}0,08 0,7:?iO,OG 0,400,04 0,5i~0,04
p, 860 )9j 0,82-0,12
p, 120 O,~P, --
O,G4~O,OG X0,5
0,300,03
p, 1a0 (�) 0,83-}-O,i0
p, i5a ~~j i,o2~o,20 -~ -- ~
o,si~:a,z,: 0,~2~0,0~ M" ,
o,to~o,b~,
P, BGO -- t,43 x-0,43 --- ~U,fry~~~1~"}
p, 200 -- i 310,28 , , '
, . 0,~8~:1~~'~',.

(O,,,r',-~ (1,~'
i
1'd, 400 -~-
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i,52~0,25 ~ 0,:,?�~ u, i
(�~~''~t'.' '
u, 800 ~ -- ~ -� ~ - ~ (0,75 ip,,
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AUT}~OFtSs lte).~a~~e,.....fl.-.~1-. , I~~lal ~ tyev~;i, i'~. S. , i;i~}:h~dov; V. N. , ~,.in Nam
~3uk, Shin,chnk, R. A.
TZTLLs T'orm.~tior� of At`~~~ and At~d7 :isotopes an bombardment of bis-
muth tsnd lead with hid h-oncrry }protons '
~'LRIUUICAL: 7hixrn~l Elks pc:rimentF.sl'noy i teoreticY:eskoy fj.ziki, v. 43, /`
no. q(1C~;i, 1)C?., 1119 - 113c~
TEXTS The iQldc of i;he li~�hteet ngtatine isotope: (At`U7' 2U~~), forl:icd ,~~
y
" t~irough the ca~~ture oi' fragments i.~npell.ed by more thin 4~0 l~lr~v, ~~~~;~xe ~ tu~:Yied
in the cour3a of radiochemical ex�tmin-jta.ons of. ~~stntin�e for�~:.t'ion reactions
dur:in~r the bombardment of .Hi~3 and Pb~1 ~~~ith high-rlner~y protoh5 (cf. ,7,hUTi~',
3'~, '~~, 1J~~3 39~ 230- 1)u0~~ llnder the :~~ne experirn~nt.~l cor�ditions rzs in
prcli~ninary ~ttxd:ies, tho sync}~r.~cyclotron of the OIYt~I P~~t:l used {'or j~roi.on
irrrtdiation gat 120-6GcJ Mev. The s,~ectra were men+surod usin~~ an ic~n7.~.~~1ion-
a(-,pectromcter rsith a grid snd the rel~~tiye yi4lds ~�1c:e calculated from tho
height of the indiv~.d~aal ~~c~aks. The t3statino isotope;; 20?-?1 1 ire a ~,~,~amed
C~.rd 1/2
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' S/0~.8~62~~026~OO~i~013~028
;~~ a4/~~ 02
~-d4ct:;;i of neutron-deficient ...
1Q~ ~ r 200(,., 5 86 ;ev) ~:ust be 'taken into
lines of Po (r~~ a 5� ~7 i;:ev) and Po ~a ~ ~ .
200 .~ L ~ 0. ~, ;.hers: "~2 is t~.e .,, .
account, It is lcno�~;n for Po that ct2~(~x2 ) ,,
transition (y�~ Q 5�~7 i',(ev). Uair:~ knotiSm data:
probability of ano~-
f ~(~. .~ x ~. E) v 5i,,� oC1 is the prabability of an oc-transition r~it:~
~ i 2
;;~ ~ 7.86 iev. The. rat~.o betv;een PrpQ~991i~yestimatedct~o be th7/v~romrer,~
t~.te and total decay prabab~-lity of
is 1 table.
ruble. 5u.rfac~ nrobabilitics and redur,ed ~vidtris.
,ends (1) s~Zrface ~,robability, (2) reduced ~a;idth.
;,;;, n
a, ' Ilosepxuo� 62
~a, a+b ~ ~ CCHaa ae� �L
A ' MaV S4 pc , w
047 ...7 ~ ~~ ~ ~ ~~
204 8 .tea
567 .0,8 O,OOi5 0;027
~~ 5'qg '0,02 0~000~3 0,007~r
2A3 '
Card 2~2
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x.0100
+ 5~448~62~026~448~413~G28
~, ~,~,~ H101~~H102
riUT3iG~,S: B~lyayev!, H. IJ., Kul,yarniia, A. V., and T~iurin, A, I~.
~.,~~~,,� ; . ~N h oz neutron-defii~ient Po isotopes
~1~LL. oG-decay

x~k;R10ilICrI,: Akademiy~z nauk SaSR, zzvestiya. Seriya fizicheeskaya, v. 26,
no. r/, 1!62, 1034 - 1036
~F~;,'~"; No direct investigation of the ~,-decay and E-capture oi' neutron-
;~.e;ieient Po iso~o_}c~ ~~hich foam during the reaction Bi(p, xn)�Po ~.s .r~o~l~,
B com~aarin~ the activities of
aecause of the complex decay series of Po. y .
the isotopes investigated c~ith the corresponding activity of an isotope
~�;hose ira.ctions of ~c -decay and E-capture are known, 'it is possible hoy~~ve:
to deter;nine indirectly the fractions of other Po nuclei unde;r~;oin~
a-deca� c.rd E-capture. po7.06 ~yns chosen as rei'erence isotope, of ~rhich
it is known that oC1~(oc+ '') ~ 5�1%0, 0l1 is the probability of Po206
c~-~.~ecay to the lowest. Pb level., oC+ L :is the tota'1 decay probability. Tire
�-activity was measuz'ed by an ionization chamber with 31-channel pulse-
hei~ht analyzer 40 - ~0 min after irradiation. The coincidemCe of the
Card 1~2
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C~.ilculati.c,r; off' t.i,~ i'~tcrlction ... 8102~B1U8
?O~a
'~i t;~r~et is f, ir:.y cc~naistent ~~:ith experimental results. after decay
"}~~ ~�~~~s fc~~l~id to 'ao 1'ry Y1ev s_incl the ;: r .,
: . o.; t Prnbable exc. to tion rrr,~, r~;y ra,3 dad
f~�acl 1 11~ ',:, 1?G ~~i:v. lf, tl~ierefor~; sn enemy of about 10 tiev is assumed. to
be imp~irted to one nLicl~~on during eva~~ar~.:tion~ tho ~xvera�*,e total nu~r:bGx� of
ncutrv~ic, emitrlw~d cli:z'1.n~r fi;~ci.on c~i.1.1 be 10 or 11. This :~s in ~tt~c~d ~>,~rec- .
mcnt to ri~~
unxz.~biguous re~lmtion:~i:ip betraeen these two qukintitic~:~ ~rhic.h as ir~#t~;~~c:�nclE}n
of whether the evaporation i.3 taken into account or noL. Irz stu~l~�l.n~ f:lzc
fission pracese in phatoemul.~ions, this relationship can be rz,3ecI #,o c~.ete~�~
mine the rnGan excitation enE~r~;y of the nucleu^ t;nder~;o:tr~ ~'i~~~a.c,;~. ~'hs
fa.csion crass sectiozz of the intex:action considerE:d between. pr~otvrzs L~