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Title: Measurement of cosmic-ray muons and muon-induced neutrons in the Aberdeen Tunnel Underground Laboratory

In this study, 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 I μ = (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 Y n = (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 < E μ > 0.76±0.03 for liquid-scintillator targets.
Authors:
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Publication Date:
Report Number(s):
BNL-112292-2016-JA
Journal ID: ISSN 2470-0010; PRVDAQ; R&D Project: CO001; KC0401022
Grant/Contract Number:
SC00112704; AC-02-05CH11231; AC-02-98CH10886
Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 93; Journal Issue: 7; Journal ID: ISSN 2470-0010
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1257960
Alternate Identifier(s):
OSTI ID: 1246181

Yeh, M., Chan, Y. L., Chen, X. C., Chu, M. C., Cui, K. X., Hahn, R. L., Ho, T. H., Hsiung, Y. B., Hu, B. Z., Kwan, K. K., Kwok, M. W., Kwok, T., Lau, Y. P., Leung, J. K. C., Leung, K. Y., Lin, G. L., Lin, Y. C., Luk, K. B., Luk, W. H., Ngai, H. Y., Ngan, S. Y., Pun, C. S. J., Shih, K., Tam, Y. H., Tsang, R. H. M., Wang, C. H., Wong, C. M., Wong, H. L. H., Wong, K. K., and Zhang, B. J.. Measurement of cosmic-ray muons and muon-induced neutrons in the Aberdeen Tunnel Underground Laboratory. United States: N. p., Web. doi:10.1103/PhysRevD.93.072005.
Yeh, M., Chan, Y. L., Chen, X. C., Chu, M. C., Cui, K. X., Hahn, R. L., Ho, T. H., Hsiung, Y. B., Hu, B. Z., Kwan, K. K., Kwok, M. W., Kwok, T., Lau, Y. P., Leung, J. K. C., Leung, K. Y., Lin, G. L., Lin, Y. C., Luk, K. B., Luk, W. H., Ngai, H. Y., Ngan, S. Y., Pun, C. S. J., Shih, K., Tam, Y. H., Tsang, R. H. M., Wang, C. H., Wong, C. M., Wong, H. L. H., Wong, K. K., & Zhang, B. J.. Measurement of cosmic-ray muons and muon-induced neutrons in the Aberdeen Tunnel Underground Laboratory. United States. doi:10.1103/PhysRevD.93.072005.
Yeh, M., Chan, Y. L., Chen, X. C., Chu, M. C., Cui, K. X., Hahn, R. L., Ho, T. H., Hsiung, Y. B., Hu, B. Z., Kwan, K. K., Kwok, M. W., Kwok, T., Lau, Y. P., Leung, J. K. C., Leung, K. Y., Lin, G. L., Lin, Y. C., Luk, K. B., Luk, W. H., Ngai, H. Y., Ngan, S. Y., Pun, C. S. J., Shih, K., Tam, Y. H., Tsang, R. H. M., Wang, C. H., Wong, C. M., Wong, H. L. H., Wong, K. K., and Zhang, B. J.. 2016. "Measurement of cosmic-ray muons and muon-induced neutrons in the Aberdeen Tunnel Underground Laboratory". United States. doi:10.1103/PhysRevD.93.072005. https://www.osti.gov/servlets/purl/1257960.
@article{osti_1257960,
title = {Measurement of cosmic-ray muons and muon-induced neutrons in the Aberdeen Tunnel Underground Laboratory},
author = {Yeh, M. and Chan, Y. L. and Chen, X. C. and Chu, M. C. and Cui, K. X. and Hahn, R. L. and Ho, T. H. and Hsiung, Y. B. and Hu, B. Z. and Kwan, K. K. and Kwok, M. W. and Kwok, T. and Lau, Y. P. and Leung, J. K. C. and Leung, K. Y. and Lin, G. L. and Lin, Y. C. and Luk, K. B. and Luk, W. H. and Ngai, H. Y. and Ngan, S. Y. and Pun, C. S. J. and Shih, K. and Tam, Y. H. and Tsang, R. H. M. and Wang, C. H. and Wong, C. M. and Wong, H. L. H. and Wong, K. K. and Zhang, B. J.},
abstractNote = {In this study, 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 < Eμ >0.76±0.03 for liquid-scintillator targets.},
doi = {10.1103/PhysRevD.93.072005},
journal = {Physical Review D},
number = 7,
volume = 93,
place = {United States},
year = {2016},
month = {4}
}