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|Abstract:||The discovery of argon from deep underground sources with significantly less Ar-39 than atmospheric argon was an important step in the development of direct dark matter detection experiments using argon as the active target. We report on the design and operation of a low-background single-phase liquid argon detector that was built to study the Ar-39 content of this underground argon. Underground argon from the Kinder Morgan CO2 plant in Cortez, Colorado was determined to have less than 0.65% of the Ar-39 activity in atmospheric argon, or 6.6 mBq/kg specific Ar-39 activity. (C) 2015 Elsevier B.V. All rights reserved.|
|Electronic Publication Date:||19-Jan-2015|
|Citation:||Xu, J, Calaprice, F, Galbiati, C, Goretti, A, Guray, G, Hohman, T, Holtz, D, Ianni, An, Laubenstein, M, Loer, B, Love, C, Martoff, CJ, Montanari, D, Mukhopadhyay, S, Nelson, A, Rountree, SD, Vogelaar, RB, Wright, A. (2015). A study of the trace Ar-39 content in argon from deep underground sources. ASTROPARTICLE PHYSICS, 66 (53 - 60. doi:10.1016/j.astropartphys.2015.01.002|
|Pages:||53 - 60|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||ASTROPARTICLE PHYSICS|
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