Current status of SK-Gd project and EGADS

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Xu, Chenyuan^1

Department of Physics, Okayama University, Okayama

700-8530, Japan^1

关键词: Current status;    Inverse beta-decay;    Neutron capture;    Supernova relic neutrinos;    Water Cherenkov detectors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/6/062070/pdf
DOI  :  10.1088/1742-6596/718/6/062070

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Supernova Relic Neutrino (SRN) has not been observed yet because of its low event rate and high background. By adding gadolinium into water Cherenkov detector, inverse beta decay will have two signals, the prompt one is positron signal and the delayed one is a ∼8 MeV gamma cascade from neutron capture on gadolinium. By this way, background for SRN can be largely reduced by detecting prompt and delayed signals coincidently, and Super-K will also have the ability to distinguish neutrino and anti-neutrino. SK-Gd is a R&D project proposed to dissolve gadolinium into Super-K. As a part of it, EGADS, a 200 ton water Cherenkov detector was built in Kamioka mine. Current status of SK-Gd project and the physics work being performed in EGADS will be presented here.