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arXiv · 2010.06484

Total kinetic energy release in the fast neutron-induced fission of 237Np

A. Pica·A. T. Chemey·L. Yao·W. Loveland·H. Y. Lee·S. A. Kuvin
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Abstract

The total kinetic energy (TKE) in the fast neutron induced fission of 237Np was measured for neutron energies from En = 2.6 - 100 MeV at the LANSCE-WNR facility. The post TKE release decreases non-linearly with increasing incident neutron energy and can be represented as TKE(MeV) = (174.38 +- 0.72) - (5.11 +- 0.5821) log10 En for En > 1 MeV. Analysis of the fragment mass distributions indicates that the decrease in TKE with increasing En is a consequence of two factors; shell effects fade out at high excitation energies, resulting in the increasing occurrence of symmetric fission, and TKEasym decreases rapidly at high En.

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A. Pica, A. T. Chemey, L. Yao, W. Loveland, H. Y. Lee, S. A. Kuvin. 2020-10-13. Total kinetic energy release in the fast neutron-induced fission of 237Np. https://doi.org/10.1103/physrevc.102.064612

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