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

P. Benetti; F. Calaprice; E. Calligarich; M. Cambiaghi; F. Carbonara; F. Cavanna; A. G. Cocco; F. Di Pompeo; N. Ferrari; G. Fiorillo; C. Galbiati; L. Grandi; G. Mangano; C. Montanari; L. Pandola; A. Rappoldi; G. L. Raselli; M. Roncadelli; M. Rossella; C. Rubbia; R. Santorelli; A. M. Szelc; C. Vignoli; Y. Zhao

doi:10.1016/j.nima.2007.01.106

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

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Abstract

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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P. Benetti, F. Calaprice, E. Calligarich, M. Cambiaghi, F. Carbonara, F. Cavanna, A. G. Cocco, F. Di Pompeo, N. Ferrari, G. Fiorillo, C. Galbiati, L. Grandi, G. Mangano, C. Montanari, L. Pandola, A. Rappoldi, G. L. Raselli, M. Roncadelli, M. Rossella, C. Rubbia, R. Santorelli, A. M. Szelc, C. Vignoli, Y. Zhao. 2007-01-10. Measurement of the specific activity of Ar-39 in natural argon. https://doi.org/10.1016/j.nima.2007.01.106

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