TY - JOUR
T1 - Measurement of the neutron cross section on argon between 95 and 720 MeV
AU - (CAPTAIN Collaboration)
AU - Martynenko, S.
AU - Bhandari, B.
AU - Bian, J.
AU - Bilton, K.
AU - Callahan, C.
AU - Chaves, J.
AU - Chen, H.
AU - Cline, D.
AU - Cooper, R. L.
AU - Danielson, D. L.
AU - Danielson, J.
AU - Dokania, N.
AU - Elliott, S.
AU - Fernandes, S.
AU - Gardiner, S.
AU - Garvey, G.
AU - Gehman, V.
AU - Giuliani, F.
AU - Glavin, S.
AU - Gold, M.
AU - Grant, C.
AU - Guardincerri, E.
AU - Haines, T.
AU - Higuera, A.
AU - Ji, J. Y.
AU - Kadel, R.
AU - Kamp, N.
AU - Karlin, A.
AU - Ketchum, W.
AU - Koerner, L. W.
AU - Lee, D.
AU - Lee, K.
AU - Liu, Q.
AU - Locke, S.
AU - Louis, W. C.
AU - Maricic, J.
AU - Martin, E.
AU - Martinez, M. J.
AU - Mauger, C.
AU - McGrew, C.
AU - Medina, J.
AU - Medina, P. J.
AU - Mills, A.
AU - Mills, G.
AU - Mirabal-Martinez, J.
AU - Olivier, A.
AU - Pantic, E.
AU - Philipbar, B.
AU - Pitcher, C.
AU - Radeka, V.
N1 - Publisher Copyright:
© 2023 American Physical Society.
PY - 2023/4/1
Y1 - 2023/4/1
N2 - We report an extended measurement of the neutron cross section on argon in the energy range of 95-720 MeV. The measurement was obtained with a 4.3-hour exposure of the Mini-CAPTAIN detector to the WNR/LANSCE beam at LANL. Compared to an earlier analysis of the same data, this extended analysis includes a reassessment of systematic uncertainties, in particular related to unused wires in the upstream part of the detector. Using this information we doubled the fiducial volume in the experiment and increased the statistics by a factor of 2.4. We also shifted the analysis from energy bins to time-of-flight bins. This change reduced the overall considered energy range, but improved the understanding of the energy spectrum of incoming neutrons in each bin. Overall, the new measurements are extracted from a fit to the attenuation of the neutron flux in five time-of-flight regions: 140-180 ns, 120-140 ns, 112-120 ns, 104-112 ns, 96-104 ns. The final cross sections are given for the flux-averaged energy in each time-of-flight bin with statistical and systematic (syst) uncertainties: σ(146 MeV)=0.60-0.14+0.14±0.08(syst) b, σ(236 MeV)=0.72-0.10+0.10±0.04(syst) b, σ(319 MeV)=0.80-0.12+0.13±0.040(syst) b, σ(404 MeV)=0.74-0.09+0.14±0.04(syst) b, σ(543 MeV)=0.74-0.09+0.09±0.04(syst) b.
AB - We report an extended measurement of the neutron cross section on argon in the energy range of 95-720 MeV. The measurement was obtained with a 4.3-hour exposure of the Mini-CAPTAIN detector to the WNR/LANSCE beam at LANL. Compared to an earlier analysis of the same data, this extended analysis includes a reassessment of systematic uncertainties, in particular related to unused wires in the upstream part of the detector. Using this information we doubled the fiducial volume in the experiment and increased the statistics by a factor of 2.4. We also shifted the analysis from energy bins to time-of-flight bins. This change reduced the overall considered energy range, but improved the understanding of the energy spectrum of incoming neutrons in each bin. Overall, the new measurements are extracted from a fit to the attenuation of the neutron flux in five time-of-flight regions: 140-180 ns, 120-140 ns, 112-120 ns, 104-112 ns, 96-104 ns. The final cross sections are given for the flux-averaged energy in each time-of-flight bin with statistical and systematic (syst) uncertainties: σ(146 MeV)=0.60-0.14+0.14±0.08(syst) b, σ(236 MeV)=0.72-0.10+0.10±0.04(syst) b, σ(319 MeV)=0.80-0.12+0.13±0.040(syst) b, σ(404 MeV)=0.74-0.09+0.14±0.04(syst) b, σ(543 MeV)=0.74-0.09+0.09±0.04(syst) b.
UR - https://www.scopus.com/pages/publications/85158896272
U2 - 10.1103/PhysRevD.107.072009
DO - 10.1103/PhysRevD.107.072009
M3 - Article
AN - SCOPUS:85158896272
SN - 2470-0010
VL - 107
JO - Physical Review D
JF - Physical Review D
IS - 7
M1 - 072009
ER -