First Measurement of the Total Neutron Cross Section on Argon Between 100 and 800 MeV

Abstract

We report the first measurement of the neutron cross section on argon in the energy range of 100-800 MeV. The measurement was obtained with a 4.3-hour exposure of the Mini-CAPTAIN detector to the WNR/LANSCE beam at LANL. The total cross section is measured from the attenuation coefficient of the neutron flux as it traverses the liquid argon volume. A set of 2,631 candidate interactions is divided in bins of the neutron kinetic energy calculated from time-of-flight measurements. These interactions are reconstructed with custom-made algorithms specifically designed for the data in a time projection chamber the size of the Mini-CAPTAIN detector. The energy averaged cross section is $0.91\pm 0.10(stat.)\pm 0.09(sys.)\mathrm{barns}$. A comparison of the measured cross section is made to the GEANT4 and FLUKA event generator packages.

arXiv comment5 pages, 1 table, 3 figures, submitted to Physical Review Letters

References in corpus (3)

• Design and Construction of the MicroBooNE Detector
• Understanding the energy resolution of liquid argon neutrino detectors
• Missing energy and the measurement of the CP-violating phase in neutrino oscillations

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• Total Neutron Cross-section Measurement on CH with a Novel 3D-projection Scintillator Detector
• Simulating hadron test beams in liquid argon
• Long-baseline neutrino oscillation physics potential of the DUNE experiment
• Demonstration of new MeV-scale capabilities in large neutrino LArTPCs using ambient radiogenic and cosmogenic activity in MicroBooNE
• Final-state interactions in neutrino-induced proton knockout from argon in MicroBooNE
• Measurement of the Neutron Cross Section on Argon Between 95 and 720 MeV
• The Mini-CAPTAIN Liquid Argon Time Projection Chamber