Accurate U238 ( n, 2n ) U237 reaction cross-section measurements from 6.5 to 14.8 MeV

Krishichayan, .; Bhike, M.; Tornow, W.; Tonchev, A. P.; Kawano, T.

doi:10.1103/PhysRevC.96.044623

Title: Accurate ${}^{238}U$ ( $n, 2 n$ ) ${}^{237}U$ 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:

Krishichayan, . ^[1]; Bhike, M. ^[1]; Tornow, W. ^[1]; Tonchev, A. P. ^[2]; Kawano, T. ^[3]

Duke Univ., Durham, NC (United States). Department of Physics; Triangle Universities Nuclear Laboratory, Durham, NC (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear and Chemical Sciences Division
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: Thu Oct 26 00:00:00 EDT 2017

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP)

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.

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                    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.  https://doi.org/10.1103/PhysRevC.96.044623

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                    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.  https://doi.org/10.1103/PhysRevC.96.044623.  https://www.osti.gov/servlets/purl/1466152.

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@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         = {Thu Oct 26 00:00:00 EDT 2017},

  month        = {Thu Oct 26 00:00:00 EDT 2017}

}

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