High energy [gamma] rays from [sup 252]Cf spontaneous fission

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.1103· OSTI ID:7059491

Hofman, D J; Back, B B; Montoya, C P; Schadmand, S; Varma, R; Paul, P ^[1]

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1. Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States)

The spontaneous fission decay of [sup 252]Cf has been analyzed in a statistical model with emphasis on describing recently reported high energy [gamma]-ray spectra. An enhanced [gamma] emission in the range from 3 to 10 MeV which is observed for nearly symmetric mass splits is readily understood as a result of the different fragment excitation energies. The model includes a viscous motion to the scission point with the possibility of prescission [gamma] emission. It was found that even with saddle-to-scission times of [tau][sub sc][lt]66[times]10[sup [minus]19] s, the maximum consistent with prescission neutron multiplicities, prescission [gamma] rays are overwhelmed by fragment [gamma] rays. Thus, the recently reported strong angular anisotropy of [gamma] rays in the range [ital E][sub [gamma]]=8--12 MeV is unexplained within the present understanding of the fission process.

• OSTI ID: 7059491
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:3; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663470* -- Fission-- (1992-)
663590 -- Nuclear Mass Ranges-- A=220 & Above-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
ANGULAR DISTRIBUTION
ANISOTROPY
CALIFORNIUM 252
CALIFORNIUM ISOTOPES
DECAY
DISTRIBUTION
EVEN-EVEN NUCLEI
FISSION
FISSION FRAGMENTS
GAMMA SPECTROSCOPY
HEAVY NUCLEI
ISOTOPES
MATHEMATICAL MODELS
NUCLEAR DECAY
NUCLEAR FRAGMENTS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
RADIOISOTOPES
SCISSION-POINT MODEL
SPECTROSCOPY
SPONTANEOUS FISSION
SPONTANEOUS FISSION RADIOISOTOPES
STATISTICAL MODELS
YEARS LIVING RADIOISOTOPES