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Title: Microscopic Calculations of 240Pu Fission

Abstract

Hartree-Fock-Bogoliubov calculations have been performed with the Gogny finite-range effective interaction for {sup 240}Pu out to scission, using a new code developed at LLNL. A first set of calculations was performed with constrained quadrupole moment along the path of most probable fission, assuming axial symmetry but allowing for the spontaneous breaking of reflection symmetry of the nucleus. At a quadrupole moment of 345 b, the nucleus was found to spontaneously scission into two fragments. A second set of calculations, with all nuclear moments up to hexadecapole constrained, was performed to approach the scission configuration in a controlled manner. Calculated energies, moments, and representative plots of the total nuclear density are shown. The present calculations serve as a proof-of-principle, a blueprint, and starting-point solutions for a planned series of more comprehensive calculations to map out a large set of scission configurations, and the associated fission-fragment properties.

Authors:
;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
925667
Report Number(s):
UCRL-TR-234682
TRN: US0802460
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; AXIAL SYMMETRY; CONFIGURATION; FISSION; HEXADECAPOLES; LAWRENCE LIVERMORE NATIONAL LABORATORY; NUCLEAR MATTER; QUADRUPOLE MOMENTS; REFLECTION; SYMMETRY

Citation Formats

Younes, W, and Gogny, D. Microscopic Calculations of 240Pu Fission. United States: N. p., 2007. Web. doi:10.2172/925667.
Younes, W, & Gogny, D. Microscopic Calculations of 240Pu Fission. United States. doi:10.2172/925667.
Younes, W, and Gogny, D. Tue . "Microscopic Calculations of 240Pu Fission". United States. doi:10.2172/925667. https://www.osti.gov/servlets/purl/925667.
@article{osti_925667,
title = {Microscopic Calculations of 240Pu Fission},
author = {Younes, W and Gogny, D},
abstractNote = {Hartree-Fock-Bogoliubov calculations have been performed with the Gogny finite-range effective interaction for {sup 240}Pu out to scission, using a new code developed at LLNL. A first set of calculations was performed with constrained quadrupole moment along the path of most probable fission, assuming axial symmetry but allowing for the spontaneous breaking of reflection symmetry of the nucleus. At a quadrupole moment of 345 b, the nucleus was found to spontaneously scission into two fragments. A second set of calculations, with all nuclear moments up to hexadecapole constrained, was performed to approach the scission configuration in a controlled manner. Calculated energies, moments, and representative plots of the total nuclear density are shown. The present calculations serve as a proof-of-principle, a blueprint, and starting-point solutions for a planned series of more comprehensive calculations to map out a large set of scission configurations, and the associated fission-fragment properties.},
doi = {10.2172/925667},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 11 00:00:00 EDT 2007},
month = {Tue Sep 11 00:00:00 EDT 2007}
}

Technical Report:

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