학술논문
Measurement of cosmic-ray muons and muon-induced neutrons in the Aberdeen Tunnel Underground Laboratory
Document Type
article
Author
Blyth, SC; Chan, YL; Chen, XC; Chu, MC; Cui, KX; Hahn, RL; Ho, TH; Hsiung, YB; Hu, BZ; Kwan, KK; Kwok, MW; Kwok, T; Lau, YP; Leung, JKC; Leung, KY; Lin, GL; Lin, YC; Luk, KB; Luk, WH; Ngai, HY; Ngan, SY; Pun, CSJ; Shih, K; Tam, YH; Tsang, RHM; Wang, CH; Wong, CM; Wong, HLH; Wong, KK; Yeh, M; Zhang, BJ
Source
Physical Review D. 93(7)
Subject
Language
Abstract
We have measured the muon flux and production rate of muon-induced neutrons at a depth of 611 m water equivalent. Our apparatus comprises three layers of crossed plastic scintillator hodoscopes for tracking the incident cosmic-ray muons and 760 L of a gadolinium-doped liquid scintillator for producing and detecting neutrons. The vertical muon intensity was measured to be Iμ=(5.7±0.6)×10-6 cm-2 s-1 sr-1. The yield of muon-induced neutrons in the liquid scintillator was determined to be Yn=(1.19±0.08(stat)±0.21(syst))×10-4 neutrons/(μ·g·cm-2). A fit to the recently measured neutron yields at different depths gave a mean muon energy dependence of 0.76±0.03 for liquid-scintillator targets.