Constraining the calculation of U234,236,238(n,γ) cross sections with measurements of the γ -ray spectra at the DANCE facility

Ullmann, J. L.; Kawano, T.; Baramsai, B.; Bredeweg, T. A.; Couture, A.; Haight, R. C.; Jandel, M.; O'Donnell, J. M.; Rundberg, R. S.; Vieira, D. J.; Wilhelmy, J. B.; Krtička, M.; Becker, J. A.; Chyzh, A.; Wu, C. Y.; Mitchell, G. E.

doi:10.1103/PhysRevC.96.024627

Constraining the calculation of ${}^{234, 236, 238}U (n, γ)$ cross sections with measurements of the $γ$ -ray spectra at the DANCE facility

Journal Article · Thu Aug 31 00:00:00 EDT 2017 · Physical Review. C

DOI:https://doi.org/10.1103/PhysRevC.96.024627· OSTI ID:1390023

Ullmann, J. L. ^[1]; Kawano, T. ^[1]; Baramsai, B. ^[1]; Bredeweg, T. A. ^[1]; Couture, A. ^[1]; Haight, R. C. ^[1]; Jandel, M. ^[1]; O'Donnell, J. M. ^[1]; Rundberg, R. S. ^[1]; Vieira, D. J. ^[1]; Wilhelmy, J. B. ^[1]; Krtička, M. ^[2]; Becker, J. A. ^[3]; Chyzh, A. ^[3]; Wu, C. Y. ^[3]; Mitchell, G. E. ^[4]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Charles Univ., Prague (Czech Republic)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
North Carolina State Univ., Raleigh, NC (United States)

The cross section for neutron capture in the continuum region has been difficult to calculate accurately. Previous results for ²³⁸U show that including an M 1 scissors-mode contribution to the photon strength function resulted in very good agreement between calculation and measurement. Our paper extends that analysis to ^{234 , 236} U by using γ -ray spectra measured with the Detector for Advanced Neutron Capture Experiments (DANCE) at the Los Alamos Neutron Science Center to constrain the photon strength function used to calculate the capture cross section. Calculations using a strong scissors-mode contribution reproduced the measured γ -ray spectra and were in excellent agreement with the reported cross sections for all three isotopes.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)

Grant/Contract Number:: 89233218CNA000001; AC52-06NA25396; AC52-07NA27344; FG02-97ER41042; NA0001784

OSTI ID:: 1390023

Alternate ID(s):: OSTI ID: 1512763
OSTI ID: 1377957
OSTI ID: 2204936

Report Number(s):: LA-UR--17-22569; LLNL-JRNL--725205; LLNL-JRNL--839194

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 2 Vol. 96; ISSN PRVCAN; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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