Measurement of the neutron capture cross-section on argon

Abstract

The use of argon as a detection and shielding medium for neutrino and dark matter experiments has made the precise knowledge of the cross section for neutron capture on argon an important design and operational parameter. Since previous measurements were averaged over thermal spectra and have significant disagreements, a differential measurement has been performed using a Time-Of-Flight neutron beam and a $\sim$4$\pi$ gamma spectrometer. A fit to the differential cross section from $0.015-0.15$\,eV, assuming a $1/v$ energy dependence, yields ${\sigma }^{2200}=673\pm 26\text{ (stat.)}\pm 59\text{ (sys.)}$\,mb.

arXiv comment5 pages, 4 figures; final version of the paper; added details and fix references

References in corpus (8)

• DarkSide-20k: A 20 Tonne Two-Phase LAr TPC for Direct Dark Matter Detection at LNGS
• Design and Construction of the MicroBooNE Detector
• The GERDA experiment for the search of 0νββ decay in ^{76}Ge
• The Large Enriched Germanium Experiment for Neutrinoless Double Beta Decay (LEGEND)
• A 4p BaF2 detector for (n,g) cross section measurements at a spallation neutron source
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Cited by in corpus (3)

• Benefits of MeV-scale reconstruction capabilities in large liquid argon time projection chambers
• Xenon-Doped Liquid Argon TPCs as a Neutrinoless Double Beta Decay Platform
• Demonstration of new MeV-scale capabilities in large neutrino LArTPCs using ambient radiogenic and cosmogenic activity in MicroBooNE