The lack of experimental data on the 35Cl(n,p)35S reaction above 100 keV has led to nuclear data evaluations that are relatively unconstrained at fast neutron energies. As a result, efforts to explore, develop, and potentially certify next generation reactor designs that incorporate chloride salts as a coolant material have been hindered. Here, we report partial cross section data for the 35Cl(n,p)35S and 35Cl(n,α)32P reactions at incident neutron energies between 0.6 MeV and 6 MeV. The measurement was performed using the pulsed beam of neutrons at the unmoderated WNR spallation neutron source at the Los Alamos Neutron Science Center, with the outgoing charged particles detected by the LENZ experimental setup, consisting of annular silicon detectors. Nonstatistical fluctuations in the 35Cl(n,p0) cross section were observed up to around 3 MeV, and the magnitude of the cross section was systematically lower than all available data evaluations at energies above 1 MeV. Modifications to the ENDF/B-VIII.0 data evaluation are suggested to better reproduce the energy averaged experimental data.
Kuvin, Sean Andrew, et al. "Nonstatistical fluctuations in the <sup>35</sup>Cl(n,p)<sup>35</sup>S reaction cross section at fast-neutron energies from 0.6 to 6 MeV." Physical Review C, vol. 102, no. 2, Aug. 2020. https://doi.org/10.1103/physrevc.102.024623
Kuvin, Sean Andrew, Lee, Hye Young, Kawano, Toshihiko, et al., "Nonstatistical fluctuations in the <sup>35</sup>Cl(n,p)<sup>35</sup>S reaction cross section at fast-neutron energies from 0.6 to 6 MeV," Physical Review C 102, no. 2 (2020), https://doi.org/10.1103/physrevc.102.024623
@article{osti_1711388,
author = {Kuvin, Sean Andrew and Lee, Hye Young and Kawano, Toshihiko and DiGiovine, Brad Joseph and Georgiadou, Anastasia and Vermeulen, Christiaan and White, Morgan Curtis and Zavorka, Lukas and Kim, Hyeong I.},
title = {Nonstatistical fluctuations in the <sup>35</sup>Cl(n,p)<sup>35</sup>S reaction cross section at fast-neutron energies from 0.6 to 6 MeV},
annote = {The lack of experimental data on the 35Cl(n,p)35S reaction above 100 keV has led to nuclear data evaluations that are relatively unconstrained at fast neutron energies. As a result, efforts to explore, develop, and potentially certify next generation reactor designs that incorporate chloride salts as a coolant material have been hindered. Here, we report partial cross section data for the 35Cl(n,p)35S and 35Cl(n,α)32P reactions at incident neutron energies between 0.6 MeV and 6 MeV. The measurement was performed using the pulsed beam of neutrons at the unmoderated WNR spallation neutron source at the Los Alamos Neutron Science Center, with the outgoing charged particles detected by the LENZ experimental setup, consisting of annular silicon detectors. Nonstatistical fluctuations in the 35Cl(n,p0) cross section were observed up to around 3 MeV, and the magnitude of the cross section was systematically lower than all available data evaluations at energies above 1 MeV. Modifications to the ENDF/B-VIII.0 data evaluation are suggested to better reproduce the energy averaged experimental data.},
doi = {10.1103/physrevc.102.024623},
url = {https://www.osti.gov/biblio/1711388},
journal = {Physical Review C},
issn = {ISSN 2469-9985},
number = {2},
volume = {102},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2020},
month = {08}}
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