Fragment Intrinsic Spins and Fragments’ Relative Orbital Angular Momentum in Nuclear Fission

Bulgac, Aurel; Abdurrahman, Ibrahim; Godbey, Kyle; Stetcu, Ionel

doi:10.1103/physrevlett.128.022501

Title: Fragment Intrinsic Spins and Fragments’ Relative Orbital Angular Momentum in Nuclear Fission

Journal Article · 12 January 2022 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.128.022501 · OSTI ID:1839635

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Univ. of Washington, Seattle, WA (United States); Texas A&M University
Univ. of Washington, Seattle, WA (United States)
Michigan State Univ., East Lansing, MI (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In this work, we present the first fully unrestricted microscopic calculations of the primary fission fragment intrinsic spins and of the fission fragments’ relative orbital angular momentum for ²³⁶U*, ²⁴⁰Pu*, and ²⁵²Cf using the time-dependent density functional theory framework. Within this microscopic approach, free of restrictions and unchecked assumptions and which incorporates the relevant physical observables for describing fission, we evaluate the triple distribution of the fission fragment intrinsic spins and of their fission fragments’ relative orbital angular momentum and show that their dynamics is dominated by their bending collective modes in contradistinction to the predictions of the existing phenomenological models and some interpretations of experimental data.

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Research Organization:: Texas A & M Univ., College Station, TX (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC); USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: NA0003841; FG02-97ER41014; NA0003885; 89233218CNA000001; AC05-00OR22725; AC02-05CH11231

OSTI ID:: 1839635

Report Number(s):: LA-UR--21-27848; 20200384ER; DE-AC05-00OR22725

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 128; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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