Comprehension of AmBe+BGO source to calibrate neutron tagging in electron antineutrino physics
T. Yano*,
H. Ito,
M. Ishitsuka,
Y. Hino,
M. Harada,
A. Minamino and
R. Shibayama*: corresponding author
Pre-published on:
August 18, 2023
Published on:
September 27, 2024
Abstract
Massive neutrino detector experiments, which are oriented for the electron antineutrino observation, calibrate their neutron tagging efficiency using AmBe neutron sources. Super-Kamiokande, a large water Cherenkov detector experiment, also started their new experimental phase SK-Gd for the astrophysical antineutrino observation. In their calibration, AmBe neutron source applied used with surrounding BGO scintillator crystals. The neutron emission is triggered and identified by scintillation light emission of 4438 keV gamma-ray from the source, and thus the neutron tagging efficiency is evaluated. Super-Kamiokande reports a relative 10% inconsistency between the efficiency value of the simulation and measurements. The reason should be investigated rapidly, and a sideband study was started to measure neutron and gamma rays from the AmBe source. In the presentation, the progress of measurements will be reported as follows: energy spectrum measurements for neutron with gamma-ray emission based on time-of-flight, emission ratio of the neutron with/without gamma-ray.
DOI: https://doi.org/10.22323/1.444.1067
How to cite
Metadata are provided both in
article format (very
similar to INSPIRE)
as this helps creating very compact bibliographies which
can be beneficial to authors and readers, and in
proceeding format which
is more detailed and complete.