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A Study of the Residual 39Ar Content in Argon from Underground Sources
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A Study of the Residual 39Ar Content in Argon from Underground Sources

J Xu, F Calaprice, C Galbiati, A Goretti, G Guray, T Hohman, D Holtz, A Ianni, M Laubenstein, B Loer, …
arXiv.org
26 Apr 2012
url
https://doi.org/10.48550/arxiv.1204.6011View
Preprint (Author's original)arXiv.org - Non-exclusive license to distribute Open

Abstract

Physics - High Energy Physics - Experiment Physics - Instrumentation and Detectors Physics - Nuclear Experiment
Astroparticle Physics, Volume 66 (2015) 53-60 The discovery of argon from underground sources with significantly less 39Ar than atmospheric argon was an important step in the development of direct-detection dark matter experiments using argon as the active target. We report on the design and operation of a low background detector with a single phase liquid argon target that was built to study the 39Ar content of the underground argon. Underground argon from the Kinder Morgan CO2 plant in Cortez, Colorado was determined to have less than 0.65% of the 39Ar activity in atmospheric argon.

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