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Title: First measurement of the yield of 8He isotopes produced in liquid scintillator by cosmic-ray muons at Daya Bay

Journal Article · · Physical Review. D.
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  1. Sun Yat-Sen Univ., Guangzhou (China); et al.
  2. Sun Yat-Sen (Zhongshan) University
  3. University of Wisconsin
  4. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  5. National Taiwan University
  6. Institute of High Energy Physics
  7. Institute of High Energy Physics; Institute of High Energy Physics
  8. National United University
  9. Tsinghua University
  10. Shenzhen University; Sun Yat-Sen (Zhongshan) University
  11. North China Electric Power University
  12. Chinese University of Hong Kong
  13. Siena College
  14. University of California
  15. University of Science and Technology of China
  16. Shandong University
  17. Brookhaven National Laboratory
  18. Charles University
  19. Joint Institute for Nuclear Research
  20. University of Illinois at Urbana-Champaign
  21. Lawrence Berkeley National Laboratory
  22. Illinois Institute of Technology
  23. Beijing Normal University
  24. Xi’an Jiaotong University
  25. Yale University
  26. China Institute of Atomic Energy
  27. Guangxi University
  28. Virginia Tech
  29. National Chiao-Tung University
  30. University of Cincinnati
  31. Temple University
  32. Dongguan University of Technology
  33. Lawrence Berkeley National Laboratory; University of California
  34. The University of Hong Kong
  35. Nankai University
  36. Shanghai Jiao Tong University
  37. Princeton University
  38. University of California; Lawrence Berkeley National Laboratory; The Hong Kong University of Science and Technology
  39. California Institute of Technology; College of William and Mary
  40. Nanjing University
  41. University of California; Lawrence Berkeley National Laboratory
  42. China General Nuclear Power Group
  43. Sun Yat-Sen (Zhongshan) University; College of William and Mary
  44. National University of Defense Technology
  45. Iowa State University
  46. Chongqing University
+ Show Author Affiliations

Here, Daya Bay presents the first measurement of cosmogenic 8He isotope production in liquid scintillator, using an innovative method for identifying cascade decays of 8He and its child isotope, 8Li. We also measure the production yield of 9Li isotopes using well-established methodology. The results, in units of 10–8μ–1⁢g–1 cm2, are 0.307 ± 0.042, 0.341 ± 0.040, and 0.546 ± 0.076 for 8He, and 6.73 ± 0.73, 6.75 ± 0.70, and 13.74 ± 0.82 for 9Li at average muon energies of 63.9 GeV, 64.7 GeV, and 143.0 GeV, respectively. The measured production rate of 8He isotopes is more than an order of magnitude lower than any other measurement of cosmogenic isotope production. It replaces the results of previous attempts to determine the ratio of 8He to 9Li production that yielded a wide range of limits from 0% to 30%. The results provide future liquid-scintillator-based experiments with improved ability to predict cosmogenic backgrounds.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0012704
OSTI ID:
2473077
Report Number(s):
BNL--226268-2024-JAAM
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 110; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (24)

Yields and production rates of cosmogenic 9Li and 8He measured with the Double Chooz near and far detectors journal November 2018
Muon-induced production of radioactive isotopes in scintillation detectors journal August 2000
Overview of the FLUKA code journal August 2015
Muon simulation codes MUSIC and MUSUN for underground physics journal March 2009
The muon system of the Daya Bay Reactor antineutrino experiment
  • An, F. P.; Balantekin, A. B.; Band, H. R.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 773 https://doi.org/10.1016/j.nima.2014.09.070
journal February 2015
The detector system of the Daya Bay reactor neutrino experiment
  • An, F. P.; Bai, J. Z.; Balantekin, A. B.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 811 https://doi.org/10.1016/j.nima.2015.11.144
journal March 2016
Recent developments in Geant4
  • Allison, J.; Amako, K.; Apostolakis, J.
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journal November 2016
Energy levels of light nuclei journal December 2004
Energy levels of light nuclei A= 12 journal December 2017
JUNO physics and detector journal March 2022
Cosmogenic Backgrounds in Borexino at 3800 m water-equivalent depth journal August 2013
Review of Particle Physics journal August 2022
Measurement of cosmic-ray muon spallation products in a xenon-loaded liquid scintillator with KamLAND journal May 2023
Production of radioactive isotopes through cosmic muon spallation in KamLAND journal February 2010
Improved measurement of the reactor antineutrino flux at Daya Bay journal September 2019
Measurement of cosmogenic Li9 and He8 production rates at RENO journal July 2022
First measurement of radioactive isotope production through cosmic-ray muon spallation in Super-Kamiokande IV journal January 2016
Cosmogenic neutron production at Daya Bay journal March 2018
Precision Measurement of Neutrino Oscillation Parameters with KamLAND journal June 2008
Indication of Reactor ν ¯ e Disappearance in the Double Chooz Experiment journal March 2012
Observation of Electron-Antineutrino Disappearance at Daya Bay journal April 2012
Observation of Reactor Electron Antineutrinos Disappearance in the RENO Experiment journal May 2012
First Measurement of High-Energy Reactor Antineutrinos at Daya Bay journal July 2022
Precision Measurement of Reactor Antineutrino Oscillation at Kilometer-Scale Baselines by Daya Bay journal April 2023

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