Chromatographic separation of radioactive noble gases from xenon
Journal Article
·
· Astroparticle Physics
The Large Underground Xenon (LUX) experiment operates at the Sanford Underground Research Facility to detect nuclear recoils from the hypothetical Weakly Interacting Massive Particles (WIMPs) on a liquid xenon target. Liquid xenon typically contains trace amounts of the noble radioactive isotopes 85Kr and 39Ar that are not removed by the in situ gas purification system. The decays of these isotopes at concentrations typical of research-grade xenon would be a dominant background for a WIMP search exmperiment. To remove these impurities from the liquid xenon, a chromatographic separation system based on adsorption on activated charcoal was built. 400 kg of xenon was processed, reducing the average concentration of krypton from 130 ppb to 3.5 ppt as measured by a cold-trap assisted mass spectroscopy system. Finally, a 50 kg batch spiked to 0.001 g/g of krypton was processed twice and reduced to an upper limit of 0.2 ppt.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); The State University of New York, Albany, NY (United States); Univ. of California, Santa Barbara, CA (United States)
- Sponsoring Organization:
- U.S. National Science Foundation; USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Contributing Organization:
- LUX Collaboration
- Grant/Contract Number:
- AC02-05CH11231; AC52-07NA27344; FG02-08ER41549; FG02-91ER40674; FG02-91ER40688; FG02-95ER40917; NA0000979; SC0006605; SC0015535
- OSTI ID:
- 1601838
- Alternate ID(s):
- OSTI ID: 1549409
OSTI ID: 1870078
OSTI ID: 1398510
OSTI ID: 3004611
- Report Number(s):
- LLNL-JRNL-834207
- Journal Information:
- Astroparticle Physics, Journal Name: Astroparticle Physics Journal Issue: C Vol. 97; ISSN 0927-6505
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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