期刊
出版社
ELSEVIER
DOI: 10.1016/j.nima.2012.01.066
关键词
Xenon; Double beta decay; Purity; Mass spectrometry
类别
资金
- DoE in the United States
- NSF in the United States
- NSERC in Canada
- SNF in Switzerland
- RFBR in Russia
- Division Of Physics
- Direct For Mathematical & Physical Scien [0969259, 0810495] Funding Source: National Science Foundation
We describe purity measurements of the natural and enriched xenon stockpiles used by the EXO-200 double beta decay experiment based on a mass spectrometry technique. The sensitivity of the spectrometer is enhanced by several orders of magnitude by the presence of a liquid nitrogen cold trap, and many impurity species of interest can be detected at the level of one part-per-billion or better. We have used the technique to screen the EXO-200 xenon before, during, and after its use in our detector, and these measurements have proven useful. This is the first application of the cold trap mass spectrometry technique to an operating physics experiment. (C) 2012 Elsevier BA/. All rights reserved.
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