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Title: Evaluating the 239Pu prompt fission neutron spectrum induced by thermal to 30 MeV neutrons

Abstract

We present a new evaluation of the 239Pu prompt fission neutron spectrum (PFNS) induced by thermal to 30 MeV neutrons. Compared to the ENDF/B-VII.1 evaluation, this one includes recently published experimental data as well as an improved and extended model description to predict PFNS. For instance, the pre-equilibrium neutron emission component to the PFNS is considered and the incident energy dependence of model parameters is parametrized more realistically. Experimental and model parameter uncertainties and covariances are estimated in detail. Also, evaluated covariances are provided between all PFNS at different incident neutron energies. In conclusion, selected evaluation results and first benchmark calculations using this evaluation are briefly discussed.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. 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:
1329593
Report Number(s):
LA-UR-15-27494
Journal ID: ISSN 2100-014X
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
EPJ Web of Conferences
Additional Journal Information:
Journal Volume: 111; Conference: WONDER2015, Aix-en Provence (France), 5-8 Oct 2015; Journal ID: ISSN 2100-014X
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Neudecker, Denise, Talou, Patrick, Kawano, Toshihiko, Kahler, Albert Comstock, Rising, Michael Evan, and White, Morgan Curtis. Evaluating the 239Pu prompt fission neutron spectrum induced by thermal to 30 MeV neutrons. United States: N. p., 2016. Web. doi:10.1051/epjconf/201611105004.
Neudecker, Denise, Talou, Patrick, Kawano, Toshihiko, Kahler, Albert Comstock, Rising, Michael Evan, & White, Morgan Curtis. Evaluating the 239Pu prompt fission neutron spectrum induced by thermal to 30 MeV neutrons. United States. doi:10.1051/epjconf/201611105004.
Neudecker, Denise, Talou, Patrick, Kawano, Toshihiko, Kahler, Albert Comstock, Rising, Michael Evan, and White, Morgan Curtis. Tue . "Evaluating the 239Pu prompt fission neutron spectrum induced by thermal to 30 MeV neutrons". United States. doi:10.1051/epjconf/201611105004. https://www.osti.gov/servlets/purl/1329593.
@article{osti_1329593,
title = {Evaluating the 239Pu prompt fission neutron spectrum induced by thermal to 30 MeV neutrons},
author = {Neudecker, Denise and Talou, Patrick and Kawano, Toshihiko and Kahler, Albert Comstock and Rising, Michael Evan and White, Morgan Curtis},
abstractNote = {We present a new evaluation of the 239Pu prompt fission neutron spectrum (PFNS) induced by thermal to 30 MeV neutrons. Compared to the ENDF/B-VII.1 evaluation, this one includes recently published experimental data as well as an improved and extended model description to predict PFNS. For instance, the pre-equilibrium neutron emission component to the PFNS is considered and the incident energy dependence of model parameters is parametrized more realistically. Experimental and model parameter uncertainties and covariances are estimated in detail. Also, evaluated covariances are provided between all PFNS at different incident neutron energies. In conclusion, selected evaluation results and first benchmark calculations using this evaluation are briefly discussed.},
doi = {10.1051/epjconf/201611105004},
journal = {EPJ Web of Conferences},
number = ,
volume = 111,
place = {United States},
year = {2016},
month = {3}
}

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