Measurement of neutron-proton capture in the SNO+ water phase

, SNO+ Collaboration and Kormos, L. L. and O'Keeffe, H. M. (2020) Measurement of neutron-proton capture in the SNO+ water phase. Physical Review C, 102 (1). ISSN 0556-2813

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Abstract

The SNO+ experiment collected data as a low-threshold water Cherenkov detector from September 2017 to July 2019. Measurements of the 2.2-MeV s produced by neutron capture on hydrogen have been made using an Am-Be calibration source, for which a large fraction of emitted neutrons are produced simultaneously with a 4.4-MeV γ. Analysis of the delayed coincidence between the 4.4-MeV γ and the 2.2-MeV capture γ revealed a neutron detection efficiency that is centered around 50% and varies at the level of 1% across the inner region of the detector, which to our knowledge is the highest efficiency achieved among pure water Cherenkov detectors. In addition, the neutron capture time constant was measured and converted to a thermal neutron-proton capture cross section of 336.3+1.2-1.5 mb.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review C
Additional Information:
© 2020 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
148015
Deposited By:
Deposited On:
06 Oct 2020 15:20
Refereed?:
Yes
Published?:
Published
Last Modified:
31 Oct 2020 07:11