Angular momentum of fission fragments

G. F. Bertsch, T. Kawano, and L. M. Robledo
Phys. Rev. C 99, 034603 – Published 4 March 2019
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Abstract

The strong deformation present immediately after scission has consequences for the angular momentum population of the fragments as well as the angular distribution of their decay radiation. We find that the usual spin-cutoff parametrization describes very well the angular momentum distribution associated with the deformation of the fragments at the scission point. Depending on the deformation, its contribution can be comparable to the thermal contribution to the angular momentum of the newly formed fragments. The M distribution of the angular momentum is highly polarized and gives rise to large anisotropies in the subsequent γ cascade. We treat in detail a typical γ cascade in a daughter nucleus, following usual model assumptions except for the anisotropy of the initial state. In principle, the observed anisotropy can provide information on the relative amounts of deformation and thermal energy present at the scission point.

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  • Received 6 November 2018

DOI:https://doi.org/10.1103/PhysRevC.99.034603

©2019 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Nuclear Physics

Authors & Affiliations

G. F. Bertsch1, T. Kawano2, and L. M. Robledo3

  • 1Department of Physics and Institute of Nuclear Theory, University of Washington, Seattle, Washington 98915, USA
  • 2Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 3Departamento de Física Teórica, Universidad Autónoma de Madrid, 28049-Madrid, Spain

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Issue

Vol. 99, Iss. 3 — March 2019

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