Measurement of the specific activity of Ar-39 in natural argon

Details Measurement of the specific activity of Ar-39 in natural argon Measurement of the specific activity of Ar-39 in natural argon

2006-03-06

arxiv.org/abs/astro-ph/0603131v2

Nucl.Instrum.Meth.A574:83-88,2007

Astronomy and Astrophysics

Astrophysics

11 pages, 6 figures, to be submitted to Nucl. Instrum. Methods A

Scientific paper

10.1016/j.nima.2007.01.106

We report on the measurement of the specific activity of Ar-39 in natural argon. The measurement was performed with a 2.3-liter two-phase (liquid and gas) argon drift chamber. The detector was developed by the WARP Collaboration as a prototype detector for WIMP Dark Matter searches with argon as a target. The detector was operated for more than two years at Laboratori Nazionali del Gran Sasso, Italy, at a depth of 3,400 m w.e. The specific activity measured for Ar-39 is 1.01 +/- 0.02(stat) +/- 0.08(syst) Bq per kg of natural Ar.

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