Neutroninduced fission: properties of prompt neutron and γ rays as a function of incident energy
Abstract
We have applied the HauserFeshbach statistical theory, in a MonteCarlo implementation, to the deexcitation of fission fragments, obtaining a reasonable description of the characteristics of neutrons and gamma rays emitted before beta decays toward stability. Originally implemented for the spontaneous fission of ^{252}Cf and the neutroninduced fission of ^{235}U and ^{239}Pu at thermal neutron energy, in this contribution we discuss the extension of the formalism to incident neutron energies up to 20 MeV. For the emission of prefission neutrons, at incident energies beyond secondchance fission, we take into account both the preequilibrium and statistical prefission components. Phenomenological parameterizations of mass, charge and TKE yields are used to obtain the initial conditions for the fission fragments that subsequently decay via neutron and emissions. Finally, we illustrate this approach for ^{239}Pu(n,f).
 Authors:

 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Publication Date:
 Research Org.:
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Sponsoring Org.:
 USDOE
 OSTI Identifier:
 1459846
 Report Number(s):
 LAUR1620240
Journal ID: ISSN 2100014X; TRN: US1901816
 Grant/Contract Number:
 AC5206NA25396
 Resource Type:
 Journal Article: Accepted Manuscript
 Journal Name:
 EPJ Web of Conferences
 Additional Journal Information:
 Journal Volume: 122; Conference: The 5th International Workshop on CompoundNuclear Reactions and Related Topics , Tokyo (Japan), 1923 Oct 2015; Journal ID: ISSN 2100014X
 Publisher:
 EDP Sciences
 Country of Publication:
 United States
 Language:
 English
 Subject:
 74 ATOMIC AND MOLECULAR PHYSICS
Citation Formats
Stetcu, Ionel, Talou, Patrick, and Kawano, Toshihiko. Neutroninduced fission: properties of prompt neutron and γ rays as a function of incident energy. United States: N. p., 2016.
Web. doi:10.1051/epjconf/201612201012.
Stetcu, Ionel, Talou, Patrick, & Kawano, Toshihiko. Neutroninduced fission: properties of prompt neutron and γ rays as a function of incident energy. United States. doi:10.1051/epjconf/201612201012.
Stetcu, Ionel, Talou, Patrick, and Kawano, Toshihiko. Tue .
"Neutroninduced fission: properties of prompt neutron and γ rays as a function of incident energy". United States. doi:10.1051/epjconf/201612201012. https://www.osti.gov/servlets/purl/1459846.
@article{osti_1459846,
title = {Neutroninduced fission: properties of prompt neutron and γ rays as a function of incident energy},
author = {Stetcu, Ionel and Talou, Patrick and Kawano, Toshihiko},
abstractNote = {We have applied the HauserFeshbach statistical theory, in a MonteCarlo implementation, to the deexcitation of fission fragments, obtaining a reasonable description of the characteristics of neutrons and gamma rays emitted before beta decays toward stability. Originally implemented for the spontaneous fission of 252Cf and the neutroninduced fission of 235U and 239Pu at thermal neutron energy, in this contribution we discuss the extension of the formalism to incident neutron energies up to 20 MeV. For the emission of prefission neutrons, at incident energies beyond secondchance fission, we take into account both the preequilibrium and statistical prefission components. Phenomenological parameterizations of mass, charge and TKE yields are used to obtain the initial conditions for the fission fragments that subsequently decay via neutron and emissions. Finally, we illustrate this approach for 239Pu(n,f).},
doi = {10.1051/epjconf/201612201012},
journal = {EPJ Web of Conferences},
issn = {2100014X},
number = ,
volume = 122,
place = {United States},
year = {2016},
month = {6}
}
Web of Science
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