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High energy gamma rays from Cf-252 spontaneous fission

Authors
  • Hofman, D.J.
  • Back, B.B.
  • Montoya, C.P.
  • Schadmand, S.
  • Varma, R.
  • Paul, P.
Publication Date
Mar 01, 1993
Identifiers
DOI: 10.1103/PhysRevC.47.1103
OAI: oai:inspirehep.net:370289
Source
INSPIRE-HEP
License
Unknown
External links

Abstract

The spontaneous fission decay of Cf252 has been analyzed in a statistical model with emphasis on describing recently reported high energy γ-ray spectra. An enhanced γ 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 γ emission. It was found that even with saddle-to-scission times of τsc<66×10−19 s, the maximum consistent with prescission neutron multiplicities, prescission γ rays are overwhelmed by fragment γ rays. Thus, the recently reported strong angular anisotropy of γ rays in the range Eγ=8–12 MeV is unexplained within the present understanding of the fission process.

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