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Title: Modelling Neutron-induced Reactions on 232–237U from 10 keV up to 30 MeV

Abstract

Comprehensive calculations of cross sections for neutron-induced reactions on 232–237U targets are performed in this paper in the 10 keV–30 MeV incident energy range with the code EMPIRE–3.2 Malta. The advanced modelling and consistent calculation scheme are aimed at improving our knowledge of the neutron scattering and emission cross sections, and to assess the consistency of available evaluated libraries for light uranium isotopes. The reaction model considers a dispersive optical potential (RIPL 2408) that couples from five (even targets) to nine (odd targets) levels of the ground-state rotational band, and a triple-humped fission barrier with absorption in the wells described within the optical model for fission. A modified Lorentzian model (MLO) of the radiative strength function and Enhanced Generalized Superfluid Model nuclear level densities are used in Hauser-Feschbach calculations of the compound-nuclear decay that include width fluctuation corrections. The starting values for the model parameters are retrieved from RIPL. Excellent agreement with available experimental data for neutron emission and fission is achieved, giving confidence that the quantities for which there is no experimental information are also accurately predicted. Finally, deficiencies in existing evaluated libraries are highlighted.

Authors:
 [1];  [2];  [3];  [2]
  1. Univ. of Bucharest (Romania). Faculty of Physics
  2. International Atomic Energy Agency, Vienna (Austria). NAPC - Nuclear Data Section
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). National Nuclear Data Center
Publication Date:
Research Org.:
Univ. of Bucharest (Romania); Brookhaven National Laboratory (BNL), Upton, NY (United States); International Atomic Energy Agency (IAEA), Vienna (Austria)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); European Commission (EC)
OSTI Identifier:
1358024
Report Number(s):
BNL-113844-2017-JA
Journal ID: ISSN 0090-3752; R&D Project: 05055; 05055; KB0301042; TRN: US1702164
Grant/Contract Number:  
SC0012704; FP7-605203
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Data Sheets
Additional Journal Information:
Journal Volume: 139; Journal ID: ISSN 0090-3752
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Sin, M., Capote, R., Herman, M. W., and Trkov, A. Modelling Neutron-induced Reactions on 232–237U from 10 keV up to 30 MeV. United States: N. p., 2017. Web. doi:10.1016/j.nds.2017.01.003.
Sin, M., Capote, R., Herman, M. W., & Trkov, A. Modelling Neutron-induced Reactions on 232–237U from 10 keV up to 30 MeV. United States. https://doi.org/10.1016/j.nds.2017.01.003
Sin, M., Capote, R., Herman, M. W., and Trkov, A. 2017. "Modelling Neutron-induced Reactions on 232–237U from 10 keV up to 30 MeV". United States. https://doi.org/10.1016/j.nds.2017.01.003. https://www.osti.gov/servlets/purl/1358024.
@article{osti_1358024,
title = {Modelling Neutron-induced Reactions on 232–237U from 10 keV up to 30 MeV},
author = {Sin, M. and Capote, R. and Herman, M. W. and Trkov, A.},
abstractNote = {Comprehensive calculations of cross sections for neutron-induced reactions on 232–237U targets are performed in this paper in the 10 keV–30 MeV incident energy range with the code EMPIRE–3.2 Malta. The advanced modelling and consistent calculation scheme are aimed at improving our knowledge of the neutron scattering and emission cross sections, and to assess the consistency of available evaluated libraries for light uranium isotopes. The reaction model considers a dispersive optical potential (RIPL 2408) that couples from five (even targets) to nine (odd targets) levels of the ground-state rotational band, and a triple-humped fission barrier with absorption in the wells described within the optical model for fission. A modified Lorentzian model (MLO) of the radiative strength function and Enhanced Generalized Superfluid Model nuclear level densities are used in Hauser-Feschbach calculations of the compound-nuclear decay that include width fluctuation corrections. The starting values for the model parameters are retrieved from RIPL. Excellent agreement with available experimental data for neutron emission and fission is achieved, giving confidence that the quantities for which there is no experimental information are also accurately predicted. Finally, deficiencies in existing evaluated libraries are highlighted.},
doi = {10.1016/j.nds.2017.01.003},
url = {https://www.osti.gov/biblio/1358024}, journal = {Nuclear Data Sheets},
issn = {0090-3752},
number = ,
volume = 139,
place = {United States},
year = {Tue Jan 17 00:00:00 EST 2017},
month = {Tue Jan 17 00:00:00 EST 2017}
}

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Cited by: 14 works
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Works referencing / citing this record:

Nuclear data correlation between different isotopes via integral information
journal, January 2018


Effects of multichance fission on isotope dependence of fission fragment mass distributions at high energies
journal, December 2019