Measurement of the neutron capture cross section on argon

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 signif...

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Bibliographic Details
Published in:Physical review. D 2019-05, Vol.99 (10), p.103021, Article 103021
Main Authors: Fischer, V., Pagani, L., Pickard, L., Couture, A., Gardiner, S., Grant, C., He, J., Johnson, T., Pantic, E., Prokop, C., Svoboda, R., Ullmann, J., Wang, J.
Format: Article
Language:English
Subjects:
Absorption cross sections
Argon
Dark matter
Dependence
Design parameters
Differential thermal analysis
Neutrinos
Neutron beams
Neutrons
Nuclear capture
Shielding
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Summary: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 σ2200=673±26(stat)±59(sys) mb.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.99.103021