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Title: Laboratory studies on the removal of radon-born lead from KamLAND׳s organic liquid scintillator

We studied the removal of radioactivity from liquid scintillator in preparation of a low background phase of KamLAND. We describe the methods and techniques developed to measure and efficiently extract radon decay products from liquid scintillator. Lastly, we report the radio-isotope reduction factors obtained when applying various extraction methods. During this study, distillation was identified as the most efficient method for removing radon daughters from liquid scintillator.
Authors:
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  1. Univ. of Alabama, Tuscaloosa, AL (United States)
  2. Univ. of Alabama, Tuscaloosa, AL (United States); Univ. of Tokyo (Japan)
  3. Tohoku Univ., Sendai (Japan)
  4. Tohoku Univ., Sendai (Japan); Univ. of Tokyo (Japan)
  5. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  6. Univ. of Tennessee, Knoxville, TN (United States)
  7. Colorado State Univ., Fort Collins, CO (United States); Univ. of Tokyo (Japan)
  8. Louisiana State Univ., Baton Rouge, LA (United States)
  9. Univ. of California, Berkeley, CA (United States); Univ. of Tokyo (Japan)
  10. Univ. of California, Berkeley, CA (United States)
  11. California Inst. of Technology (CalTech), Pasadena, CA (United States); Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  12. Stanford Univ., CA (United States)
  13. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Yale Univ., New Haven, CT (United States)
  14. Univ. of California, Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  15. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Tennessee, Knoxville, TN (United States)
  16. Triangle Univ. Nuclear Laboratory, Durham, NC (United States); Duke Univ., Durham, NC (United States); Univ. of North Carolina, Chapel Hill, NC (United States)
  17. Drexel Univ., Philadelphia, PA (United States)
  18. Univ. of Hawaii at Manoa, Honolulu, HI (United States)
  19. Kansas State Univ., Manhattan, KS (United States)
Publication Date:
Grant/Contract Number:
FG02-01ER41166; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 769; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; KamLAND; low background; purification; liquid scintillator; solar neutrinos
OSTI Identifier:
1252722
Alternate Identifier(s):
OSTI ID: 1245656