Cosmogenic neutron production at Daya Bay
Abstract
Neutrons produced by cosmic ray muons are an important background for underground experiments studying neutrino oscillations, neutrinoless double beta decay, dark matter, and other rare-event signals. A measurement of the neutron yield in the three different experimental halls of the Daya Bay Reactor Neutrino Experiment at varying depth is reported. The neutron yield in Daya Bay's liquid scintillator is measured to be Y_n=(10.26±0.86)×10^(−5), (10.22±0.87)×10^(−5), and (17.03±1.22)×10^(−5) μ^(−1) g^(−1) cm^2 at depths of 250, 265, and 860 meters-water-equivalent. These results are compared to other measurements and the simulated neutron yield in FLUKA and GEANT4. A global fit including the Daya Bay measurements yields a power law coefficient of 0.77±0.03 for the dependence of the neutron yield on muon energy.
Additional Information
© 2018 Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3. Received 3 November 2017; published 26 March 2018. The Daya Bay Experiment is supported in part by the Ministry of Science and Technology of China, the United States Department of Energy, the Chinese Academy of Sciences, the CAS Center for Excellence in Particle Physics, the National Natural Science Foundation of China, the Guangdong provincial government, the Shenzhen municipal government, the China General Nuclear Power Group, the Research Grants Council of the Hong Kong Special Administrative Region of China, the Ministry of Education in Taiwan, the U.S. National Science Foundation, the Ministry of Education, Youth and Sports of the Czech Republic, the Joint Institute of Nuclear Research in Dubna, Russia, the NSFC-RFBR joint research program, the National Commission for Scientific and Technological Research of Chile. We acknowledge Yellow River Engineering Consulting Co., Ltd. and China Railway 15th Bureau Group Co., Ltd. for building the underground laboratory. We are grateful for the ongoing cooperation from the China Guangdong Nuclear Power Group and China Light & Power Company.Attached Files
Published - PhysRevD.97.052009.pdf
Submitted - 1711.00588.pdf
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Additional details
- Eprint ID
- 85521
- Resolver ID
- CaltechAUTHORS:20180330-085228657
- Ministry of Science and Technology (Taipei)
- Department of Energy (DOE)
- Chinese Academy of Sciences
- National Natural Science Foundation of China
- Guangdong Provincial Government
- Shenzhen Municipal Government
- China General Nuclear Power Group
- Research Grants Council of the Hong Kong Special Administrative Region of China
- Ministry of Education (Taipei)
- NSF
- Ministry of Education, Youth and Sports of the Czech Republic
- Joint Institute of Nuclear Research (Dubna)
- Russian Foundation for Basic Research
- Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)
- Created
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2018-03-30Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field