New binary and ternary spontaneous modes for {sup 252}Cf and new band structures with gammasphere

Journal Article · Sat Feb 01 00:00:00 EST 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.52597· OSTI ID:664609

Hamilton, J H; Ramayya, A V ^[1]; Ter-Akopian, G M ^[1]; Hwang, J K; Kormicki, J; Babu, B R ^[1]; Sandulescu, A; Florescu, A ^[1]; Greiner, W ^[1]; Oganessian, Y T ^[2]; Daniel, A V ^[1]; Zhu, S J ^[1]; Wang, M G ^[3]; Ginter, T; Deng, J K ^[1]; Ma, W C ^[4]; Popeko, G S ^[5]; Lu, Q H; Jones, E; Dodder, R ; others, and

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1. Vanderbilt University, Physics Department, Nashville, Tennessee (United States) 37235
2. Joint Institute for Nuclear Research, Dubna 141980 (Russia)
3. Tsinghua University, Physics Department, Beijing, (China)
4. Mississippi State University, Physics Department, Mississippi State, Mississippi (United States) 39762
5. 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 Lab. (LBNL), Berkeley, CA (United States)
• 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-; ISSN 0094-243X; TRN: 98:010854
• Journal Information: AIP Conference Proceedings, Vol. 392, Issue 1; Conference: 14. international conference on the application of accelerators in research and industry, Denton, TX (United States), 6-9 Nov 1996; Other Information: PBD: Feb 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CALIFORNIA
CALIFORNIUM 252
SPONTANEOUS FISSION
FISSION PRODUCTS
CORRELATION FUNCTIONS
SYMMETRY BREAKING
GAMMA SPECTRA
DEFORMED NUCLEI
NEUTRON SPECTRA
BARIUM 144
BARIUM 146
ENERGY LEVELS