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

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4]
  1. Univ. of Washington, Seattle, WA (United States); Texas A&M University
  2. Univ. of Washington, Seattle, WA (United States)
  3. Michigan State Univ., East Lansing, MI (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
+ Show Author Affiliations
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.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Texas A & M Univ., College Station, TX (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
Grant/Contract Number:
89233218CNA000001; AC02-05CH11231; AC05-00OR22725; FG02-97ER41014; NA0003841; NA0003885
OSTI ID:
1839635
Alternate ID(s):
OSTI ID: 1841950
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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73 NUCLEAR PHYSICS AND RADIATION PHYSICS