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Abstract

The fission fragment properties of the reaction (237)Np(n,f) have been investigated at IRMM in the neutron energy range E(n)=O.3 to 5.5 MeV. Above E(n)=O.5 MeV, TKE averaged over all fission fragment masses shows a continuously decreasing trend. The observed variations in the TKE as a function of the compound nuclear excitation energy have been attributed to a combination of the changes in the mass yield and TKE (A) distributions.

A description of the two-dimensional mass-TKE distributions has been obtained in terms of fission modes in the frame of the multi-modal random neck-rupture model. The inclusion of the super-long symmetric mode is necessary to explain the observed dip in the experimental TKE close to symmetry.

Additional information

Authors: VIVES F, EC-JRC Institute for Reference Materials and Measurements NP (BE);SIEGLER P, EC-JRC Institute for Reference Materials and Measurements NP (BE);OBERSTEDT S, Institut Laue-Lengevin, Grenoble (FR);HAMBSCH F.J, EC-JRC Institute for Reference Materials and Measurements NP (BE)
Bibliographic Reference: Article published in: Nuclear Physics A, 679 (2000) pp3-24
Record Number: 200013102 / Last updated on: 2001-02-23
Category: PUBLICATION
Original language: en
Available languages: en
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