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Title: Accurate U 238 ( n ,   2 n ) U 237 reaction cross-section measurements from 6.5 to 14.8 MeV

Abstract

In this study, the cross section for the 238U(n,2n)237U reaction has been measured in the incident neutron energy range from 6.5 to 14.8 MeV in small energy steps using an activation technique. Monoenergetic neutron beams were produced via the 2H( d,n ) 3He and 3H ( d,n ) 4He reactions. 238U targets were activated along with Au and Al monitor foils to determine the incident neutron flux. The activity of the reaction products was measured in TUNL's low-background counting facility using high-resolution γ-ray spectroscopy. The results are compared with previous measurements and latest data evaluations. Statistical-model calculations, based on the Hauser-Feshbach formalism, have been carried out using the CoH3 code and are compared with the experimental results. Finally, the present self-consistent and high-quality data are important for stockpile stewardship and nuclear forensic purposes as well as for the design and operation of fast reactors.

Authors:
 [1];  [1];  [1];  [2];  [3]
  1. Duke Univ., Durham, NC (United States). Department of Physics; Triangle Universities Nuclear Laboratory, Durham, NC (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear and Chemical Sciences Division
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1466152
Alternate Identifier(s):
OSTI ID: 1405045
Report Number(s):
LLNL-JRNL-740996
Journal ID: ISSN 2469-9985; 895346
Grant/Contract Number:  
AC52-07NA27344; NA0002936; FG02-97ER41033; AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 96; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Krishichayan, ., Bhike, M., Tornow, W., Tonchev, A. P., and Kawano, T. Accurate U238 ( n, 2n ) U237 reaction cross-section measurements from 6.5 to 14.8 MeV. United States: N. p., 2017. Web. doi:10.1103/PhysRevC.96.044623.
Krishichayan, ., Bhike, M., Tornow, W., Tonchev, A. P., & Kawano, T. Accurate U238 ( n, 2n ) U237 reaction cross-section measurements from 6.5 to 14.8 MeV. United States. doi:10.1103/PhysRevC.96.044623.
Krishichayan, ., Bhike, M., Tornow, W., Tonchev, A. P., and Kawano, T. Thu . "Accurate U238 ( n, 2n ) U237 reaction cross-section measurements from 6.5 to 14.8 MeV". United States. doi:10.1103/PhysRevC.96.044623. https://www.osti.gov/servlets/purl/1466152.
@article{osti_1466152,
title = {Accurate U238 ( n, 2n ) U237 reaction cross-section measurements from 6.5 to 14.8 MeV},
author = {Krishichayan, . and Bhike, M. and Tornow, W. and Tonchev, A. P. and Kawano, T.},
abstractNote = {In this study, the cross section for the 238U(n,2n)237U reaction has been measured in the incident neutron energy range from 6.5 to 14.8 MeV in small energy steps using an activation technique. Monoenergetic neutron beams were produced via the 2H( d,n ) 3He and 3H ( d,n ) 4He reactions. 238U targets were activated along with Au and Al monitor foils to determine the incident neutron flux. The activity of the reaction products was measured in TUNL's low-background counting facility using high-resolution γ-ray spectroscopy. The results are compared with previous measurements and latest data evaluations. Statistical-model calculations, based on the Hauser-Feshbach formalism, have been carried out using the CoH3 code and are compared with the experimental results. Finally, the present self-consistent and high-quality data are important for stockpile stewardship and nuclear forensic purposes as well as for the design and operation of fast reactors.},
doi = {10.1103/PhysRevC.96.044623},
journal = {Physical Review C},
number = 4,
volume = 96,
place = {United States},
year = {2017},
month = {10}
}

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