P. Cennini et al., ON ATMOSPHERIC AR-39 AND AR-42 ABUNDANCE, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 356(2-3), 1995, pp. 526-529
Ar-39 and Ar-42 are possible sources of background in large volume arg
on based detectors for the study of low energy neutrino events, as pro
posed for the ICARUS experiment. The production of these nuclides from
neutron capture by atmospheric argon is estimated by taking into acco
unt both cosmic rays and contributions from nuclear explosions.