Abstract:Abstract-The number of lung-cancer-related death is highest among all cancers in the world, and it is increasing in Japan where population aging in progressing. The main reason for the lung cancer of non-smokers is regarded to be environmental pollution or exposure of the lung to radon in the nature. The risk of lung cancer was estimated to increase by 8 to 13% per every 100 Bq m −3 concentration of radon in the air. We observed beta rays with maximum energy of 3.27 MeV emitted from 214 Bi as one of the progen… Show more
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