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

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 ^{236}U^{*}, ^{240}Pu^{*}, and ^{252}Cf using the time-dependent density functional theory framework. Within this...

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Bibliographic Details
Published in:Physical review letters Vol. 128; no. 2; p. 022501
Main Authors: Bulgac, Aurel, Abdurrahman, Ibrahim, Godbey, Kyle, Stetcu, Ionel
Format: Journal Article
Language:English
Published: United States American Physical Society (APS) 14.01.2022
Subjects:
NUCLEAR PHYSICS AND RADIATION PHYSICS
ISSN:0031-9007, 1079-7114, 1079-7114
Online Access:Get full text
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Summary: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 ^{236}U^{*}, ^{240}Pu^{*}, and ^{252}Cf 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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USDOE Office of Science (SC)
NA0003841; FG02-97ER41014; NA0003885; 89233218CNA000001; 20200384ER; AC05-00OR22725; AC02-05CH11231
USDOE Laboratory Directed Research and Development (LDRD) Program
LA-UR-21-27848
USDOE National Nuclear Security Administration (NNSA)
ISSN:0031-9007
1079-7114
1079-7114
DOI:10.1103/PhysRevLett.128.022501