Description
Detecting neutron capture gamma-rays following a charged lepton signal has long been a crucial technique in identifying antineutrino charged current interactions. Since August 2020, the Super-Kamiokande detector has loaded 0.01w% of Gd, the element known to be highly effective in capturing neutrons and emitting gamma-rays, to improve its antineutrino identification capability. Using the 2-years of atmospheric neutrino data taken during the first phase of SK-Gd and a semi-tuned simulation, we verify that neutrino-induced neutrons are captured by the dissolved Gd as expected, and report on our current understanding of the gamma-ray signals from Gd-neutron captures.
| Collaboration | Super-Kamiokande |
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Primary author
Seungho Han
(ICRR, Univ. of Tokyo)
