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A detailed analysis has been carried out of fission fragment distributions and the respective momenta as a function of the excitation energy of the compound nucleus The yield distribution neither as a function of the fragment mass nor as a function of the total kinetic energy (TKE) could be clearly connected to changes in the mean TKE observed for different excitation energies. The consideration of multi-modal fission offers an improved possibility for the description of the fragment distributions. Theoretical calculations on the basis of the multi-modal random-neck rupture model of Brosa, Großmann and Müller have been completed for the compound system 238Np, predicting the existence of four independent fission modes in the mass-energy distribution.

Additional information

Authors: SIEGLER P, JRC Geel (BE);HAMBSCH F-J, JRC Geel (BE);THEOBALD J P, Technische Hochscule Darmstadt (DE)
Bibliographic Reference: Paper presented: Seminar on Fission 'Pont d'Oye III', Gent (BE), May 9-11, 1995
Availability: Available from (1) as Paper EN 39027 ORA
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