Description of induced nuclear fission with Skyrme energy functionals: Static potential energy surfaces and fission fragment properties

Schunck, N.; Duke, D.; Carr, H.; Knoll, A.

doi:10.1103/PhysRevC.90.054305

Title: Description of induced nuclear fission with Skyrme energy functionals: Static potential energy surfaces and fission fragment properties

Journal Article · Thu Nov 06 00:00:00 EST 2014 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.90.054305· OSTI ID:1565368

Schunck, N. ^[1]; Duke, D. ^[2]; Carr, H. ^[2]; Knoll, A. ^[3]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Leeds, Leeds (United Kingdom)
Argonne National Lab. (ANL), Argonne, IL (United States)

Eighty years after its experimental discovery, a description of induced nuclear fission based solely on the interactions between neutrons and protons and quantum many-body methods still poses formidable challenges. The goal of this paper is to contribute to the development of a predictive microscopic framework for the accurate calculation of static properties of fission fragments for hot fission and thermal or slow neutrons. To this end, we focus on the ²³⁹Pu($n ,f$ ) reaction and employ nuclear density functional theory with Skyrme energy densities. Potential energy surfaces are computed at the Hartree-Fock-Bogoliubov approximation with up to five collective variables. We find that the triaxial degree of freedom plays an important role, both near the fission barrier and at scission. The impact of the parametrization of the Skyrme energy density and the role of pairing correlations on deformation properties from the ground state up to scission are also quantified. We introduce a general template for the quantitative description of fission fragment properties. It is based on the careful analysis of scission configurations, using both advanced topological methods and recently proposed quantum many-body techniques. We conclude that an accurate prediction of fission fragment properties at low incident neutron energies, although technologically demanding, should be within the reach of current nuclear density functional theory.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725; AC52-07NA27344

OSTI ID:: 1565368

Alternate ID(s):: OSTI ID: 1180689

Journal Information:: Physical Review C, Nuclear Physics, Vol. 90, Issue 5; ISSN 0556-2813

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 73 works

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