Measurement of the specific activity of 39Ar in natural argon
/ Authors
P. Benetti, F. Calaprice, E. Calligarich, M. Cambiaghi, F. Carbonara, F. Cavanna, A. Cocco, F. D. Pompeo, N. Ferrari, G. Fiorillo
and 14 more authors
C. Galbiati, L. Grandi, G. Mangano, C. Montanari, L. Pandola, A. Rappoldi, G. Raselli, M. Roncadelli, M. Rossella, C. Rubbia, R. Santorelli, A. Szelc, C. Vignoli, Yue Zhao
/ Abstract
Abstract We report on the measurement of the specific activity of 39Ar in natural argon. The measurement was performed with a 2.3-l 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 3400 m w.e. The specific activity measured for 39Ar is 1.01 ± 0.02 ( stat ) ± 0.08 ( syst ) Bq per kg of natAr.
Journal: Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment