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  • New results in fission : Fission modes and bifurcation points - inhomogeneous elasticity of a prescission nucleus - scission neutron production mechanism in 252Cf(SF)

Abstract

The multimodal fission model introduced by Brosa et al. explains many features of fission through the whole actinide mass range. The mass, average total kinetic energy and the variance distribution are shown for thermal neutron induced fission of 235U. The fission fragment yield shows strong variations of the mass distribution from one resonance to another, which can be interpreted as fluctuations in the populations of the three fission modes. Enormous amplification together with the existence of distinct fission modes is typical of their physical bifurcation points. The elastic energy of the fragments depends on the "elasticity module" and the deviation from average elongation. The scission neutron spectrum indicates emission from a slow source in the disintegration of liquid jets, rather than formation by rapidly changing nuclear potentials.

Additional information

Authors: KNITTER H-H, JRC Geel (BE);HAMBSCH F-J, JRC Geel (BE);BROSA U, JRC Geel (BE);BUDTZ-JORGENSEN C, JRC Geel (BE)
Bibliographic Reference: Paper presented: General Scientific Meeting of the Belgian Physical Society, Louvain-la-Neuve (FR), May 31 - June 1, 1990
Availability: Text not available
Record Number: 199011033 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en