Summary
It is shown by experiments that radioactive32P is formed as a spallation product of argon by cosmic rays. This32P is found in the rain water, and its average activity in fresh rain water of Rio de Janeiro is 0.20 dpm/liter.
Riassunto
Si dimostra per mezzo di esperimenti che il32P radioattivo si forma come prodotto di scissione dell’argon sotto l’azione dei raggi cosmici. Lo si trova nell’acqua piovana e la sua attività media nell’acqua piovana recente è a Rio de Janerio 0,20 dpm/litro.
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References
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Marquez, L., Costa, N.L. The formation of32P from atmospheric argon by cosmic rays. Nuovo Cim 2, 1038–1041 (1955). https://doi.org/10.1007/BF02855849
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DOI: https://doi.org/10.1007/BF02855849