INDC(IND)-35G - IAEA Nuclear Data Services
INDC(IND)-35G - IAEA Nuclear Data Services
INDC(IND)-35G - IAEA Nuclear Data Services
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
- 5 -<br />
Cumulative yields cf rare-earth tpufxm product* to the spontaneous fission<br />
of<br />
B.S. Toaar, H. HaJk, A. Xamaawaa/, Satjya Prakash and M.Y. Ramanlah<br />
In view of Hit paucity of data on the MM yields of short lived xare-<br />
earth fission products, -the present .study ,mi aiaed at d«ter«inir« tii«<br />
cuaalatl-v* yi«ld» of aaiuljr ahozt llvad xmxa ea^Hfa laotopas in »pontaneou«<br />
252<br />
ftoaion of Cf.<br />
Piaaion pacodnst* fro» a -v 3/% 252 Cf •ouzo* Mit colleoted OP 1 mil<br />
alualaiua cateh«x foils. HM csllvction tiat was rartod depanding oa Hi* half<br />
life of 1he isotops under study. Ib catcher foils were dissolved in dil HC1<br />
in presence of lanthanua carrier. Baxe earlfas were separated ty fast erne<br />
step fluoride and hydroxide precipitation and -this precipitate was dissolved<br />
in 5 «1 dil HC1 and counted. The oountinf was done on a pxecalibrated G9£ HPGe<br />
detector, (having a xesolutlon of 1.8 Kiev at 1332 Kev) coupled to a 4096<br />
channel analyser.<br />
the gaant ray peak areas wexe corxeoted for absolute disintegration<br />
rate hy using gaasa ray abundance^ 1 ' and detector efficiency. The yields of<br />
xaxe-eartbs Isotopes were determined relative to the yield of * Oe^ ' and<br />
axe shown In table 1 alongwiih 1fae litezatuze. values®~J', The pxesent<br />
yield values axe in good agreement with the literature data except la case<br />
of 15 Vd. the fission yield of * 5 Ce is determined for the fixst tine. The<br />
laxge difference between enr value and the literature value for W could<br />
be plausibly due to fee laxge variation In gamna ray abundance value* taken<br />
for yield calculation.<br />
References<br />
1. J. Blachot and Ch. *iohe. Annals He Ihysique &, 3 (1981).