Yields of correlated fragment pairs in spontaneous fission of {sup 252}Cf

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Bulletin of the American Physical Society

OSTI ID:386972

Ter-Akopian, G M; Oganessian, Yu T; Popeko, G S; Daniel, A V ^[1]

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1. and others

The spontaneous fission of {sup 252}Cf was studied via {gamma}-{gamma} coincidences in a 20 Ge detector ball at HHIRF. Double and triple coincidences were recorded and analyzed. The triple gates unique spectra for two correlated fission partners. The relative yields the correlated fragment pairs have been extracted for Zr(Z = 40)/Ce(58) and Mo(42)/BA(56). For the first time, relative yields are observed for zero neutron up to 8 and tentatively 10 neutron emission. These neutron multiplicities are deduced directly from the experimental data. For the first time the charge asymmetry dependence of the mean number of prompt neutrons is deduced from experiment. For the 42/56 charge asymmetry, we obtain <{nu}> =3.91. While the most probable yield of a Zr isotope as a {sup 146}Ce partner is 2n higher than for {sup 146}Ge, the average < A > for the Zr isotopes increases only 0.5 for {sup 146}Ge compared to {sup 148}Ce.

• DOE Contract Number: FG05-88ER40407; AC07-76ID01570; AC05-84OR21400
• OSTI ID: 386972
• Report Number(s): CONF-931044--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CALIFORNIUM 252
FISSION FRAGMENTS
FISSION YIELD
GE SEMICONDUCTOR DETECTORS
SPONTANEOUS FISSION