Vd. Ashitkov et al., NEW EXPERIMENTAL LIMIT ON THE AR-42 CONTENT IN THE EARTHS ATMOSPHERE, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 416(1), 1998, pp. 179-181
Using a liquid argon ionization chamber a new experimental limit on th
e Ar-42 content in the Earth's atmosphere was found to be less than 6
x 10(-21) parts of Ar-42 per part of Ar-nat at the 90% CL. (C) 1998 El
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