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arXiv · 0811.0735

First Study of Neutron Tagging with a Water Cherenkov Detector

Kamiokande Collaboration·H. Watanabe·H. Zhang
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Abstract

A first study of neutron tagging is conducted in Super--Kamiokande, a 50,000-ton water Cherenkov detector. The tagging efficiencies of thermal neutrons are evaluated in a 0.2 % GdCl$_{3}$-water solution and pure water. They are determined to be, respectively, 66.7 % for events above 3 MeV and 20 % with corresponding background probabilities of 2 $\times$ 10$^{-4}$ and 3 $\times$ 10$^{-2}$. This newly developed technique may enable water Cherenkov detectors to identify $\bar \nu_{e}$'s geological or astrophysical sources as well as those produced by commercial reactors via the delayed coincidence scheme.

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Kamiokande Collaboration, H. Watanabe, H. Zhang. 2008-11-05. First Study of Neutron Tagging with a Water Cherenkov Detector. https://doi.org/10.1016/j.astropartphys.2009.03.002

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