Natural radioactive isotopes in the atmosphere at Kodiak and Wales, Alaska

Abstract
The concentrations of natural radioisotopes of the radon and thoron series in the air in Alaska have been determined from data collected by NRL air-monitor equipment operated at Kodiak (1950–1960) and Wales (1953–1959). Seasonal variations in the concentrations of these activities at both sites have been observed; the average concentrations are compared with those at other sites where similar measurements have been made. DOI: 10.1111/j.2153-3490.1962.tb01347.x

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