New binary and ternary spontaneous modes for {sup 252}Cf and new band structures with gammasphere
- Vanderbilt University, Physics Department, Nashville, Tennessee (United States) 37235
- Joint Institute for Nuclear Research, Dubna 141980 (Russia)
- Tsinghua University, Physics Department, Beijing, (China)
- Mississippi State University, Physics Department, Mississippi State, Mississippi (United States) 39762
- Joint Institute for Nuclear Research, Dubna141980 (Russia)
Prompt {gamma}-{gamma}-{gamma} coincidence studies following spontaneous fission of {sup 252}Cf were carried out at Gammasphere first with 36 and later with 72 Ge detectors. Yields and neutron multiplicities were measured directly for Sr-Nd, Zr-Ce Mo-Ba, Ru-Xe, and Pd-Te correlated pairs. A new hot fission mode was discovered going via only {sup 108}Mo-{sup 144}Ba, {sup 107}Mo-{sup 145}Ba, and/or {sup 106}Mo-{sup 146}Ba pairs where one or more of {sup 144,145,146}Ba are hyperdeformed at scission with 3:1 axis ratio. For the first time correlated pairs involved in cold ternary fission were observed with the third particle {sup 4}He, possibly {sup 6}He, and {sup 10}Be. The {sup 142-146}Ba data provide evidence for the predicted disappearance of stable octupole deformation at high spins. New level structures and isotopes include new octupole deformations, identical bands and other structures. {copyright} {ital 1997 American Institute of Physics.}
- Research Organization:
- Lawrence Berkeley National Laboratory
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC03-76SF00098; AC07-76ID01570; FG05-87ER40361; FG02-88ER40407; W-7405-ENG-48
- OSTI ID:
- 664609
- Report Number(s):
- CONF-961110--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 392; ISSN 0094-243X; ISSN APCPCS
- Country of Publication:
- United States
- Language:
- English
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