Measurement of the neutron capture cross section on argon

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1902.00596v3.pdf(397.57 KB)
Accepted manuscript
Date
2019
Authors
Fischer, V.
Pagani, L.
Pickard, L.
Couture, A.
Gardiner, S.
Grant, C.
He, J.
Johnson, T.
Pantic, E.
Prokop, C.
Version
Accepted manuscript
OA Version
Citation
V. Fischer, L. Pagani, L. Pickard, A. Couture, S. Gardiner, C. Grant, J. He, T. Johnson, E. Pantic, C. Prokop, R. Svoboda, J. Ullmann, J. Wang. "Measurement of the neutron capture cross section on argon." Physical Review D, Volume 99, Issue 10, 2019. https://doi.org/10.1103/physrevd.99.103021
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 ∼4π gamma spectrometer. A fit to the differential cross section from 0.015–0.15 eV, assuming a 1/v energy dependence, yields σ^2200=673±26(stat)±59(sys)  mb.
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