Total kinetic energy release in the fast-neutron-induced fission of Np237

A. Pica, A. T. Chemey, L. Yao, W. Loveland, H. Y. Lee, and S. A. Kuvin
Phys. Rev. C 102, 064612 – Published 11 December 2020

Abstract

The total kinetic energy (TKE) release in the fast neutron-induced fission of Np237 was measured for neutron energies from En=2.6100MeV at the Los Alamos Neutron Science Center at the Weapons Neutron Research facility. The post-TKE release decreases nonlinearly with increasing incident neutron energy and can be represented as TKE(MeV)=(174.38±0.72)(5.11±0.5821)log10En for En>1MeV. Analysis of the fragment mass distributions indicates that the decrease in TKE with increasing En is a consequence of the fading out of shell effects at high excitation energies (resulting in an increase of symmetric fission) and the decrease of the total kinetic energy associated with asymmetric fission with increasing En.

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  • Received 22 September 2020
  • Accepted 10 November 2020

DOI:https://doi.org/10.1103/PhysRevC.102.064612

©2020 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

A. Pica1, A. T. Chemey1, L. Yao1, W. Loveland1, H. Y. Lee2, and S. A. Kuvin2

  • 1Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, USA
  • 2Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

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Vol. 102, Iss. 6 — December 2020

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