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. 2013 Nov:81:151-5.
doi: 10.1016/j.apradiso.2013.03.050. Epub 2013 Mar 22.

A new shallow underground gas-proportional counting lab--first results and Ar-37 sensitivity

C E Aalseth  1 , A R Day, E S Fuller, E W Hoppe, M E Keillor, B Leferriere, E K Mace, J Merriman, A W Myers, C T Overman, M E Panisko, A Seifert, G A Warren, R M Williams
Affiliations

A new shallow underground gas-proportional counting lab--first results and Ar-37 sensitivity

C E Aalseth et al. Appl Radiat Isot. 2013 Nov.

Abstract

A new ultra-low-background proportional counter was recently developed with an internal volume of 100 cm(3) and has been characterized at pressures from 1-10 atm with P-10 (90% Ar, 10% methane) gas. This design, along with a counting system providing event digitization and passive and active shielding, has been developed to complement a new shallow underground laboratory (30 m water-equivalent). Backgrounds and low-level reference materials have been measured, and system sensitivity for (37)Ar has been calculated.

Keywords: Argon-37; Beta spectroscopy; Proportional counter; Shallow underground.

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