First Study of Neutron Tagging with a Water Cherenkov Detector
نویسندگان
چکیده
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 % GdCl3-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 × 10 and 3 × 10. This newly developed technique may enable water Cherenkov detectors to identify ν̄e’s geological or astrophysical sources as well as those produced by commercial reactors via the delayed coincidence scheme.
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