Microscopic calculation of fission product yields for odd-mass nuclei

Schunck, N.; Verriere, M.; Potel Aguilar, G.; Malone, R. C.; Silano, J. A.; Ramirez, A. D.; Tonchev, A. P.

doi:10.1103/physrevc.107.044312

Title: Microscopic calculation of fission product yields for odd-mass nuclei

Journal Article · 17 April 2023 · Physical Review. C

DOI: https://doi.org/10.1103/physrevc.107.044312 · OSTI ID:1992190

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Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Duke Univ., Durham, NC (United States)

Fission data are essential inputs to reaction networks involved in nucleosynthesis simulations and nuclear forensics. In such applications as well as in the description of multichance fission, the characteristics of fission for odd-mass nuclei are just as important as those for even-even nuclei. The fission theories that aim at explicitly describing fission dynamics are typically based on some variant of the nuclear mean-field theory. In such cases, the treatment of systems with an odd number of particles is markedly more involved, both formally and computationally. In this article, we use the blocking prescription of the Hartree-Fock-Bogoliubov theory with Skyrme energy functionals to compute the deformation properties of odd-mass uranium isotopes. We show that the resulting fission fragment distributions depend quite significantly on the spin of the odd neutron. By direct calculation of the spin distribution of the fissioning nucleus, we propose a methodology to rigorously predict the charge and mass distributions in odd-mass nuclei.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1992190

Report Number(s):: LLNL-JRNL-843567; 1066232; TRN: US2404171

Journal Information:: Physical Review. C, Vol. 107, Issue 4; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Microscopic calculation of fission product yields for odd-mass nuclei

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