Letters to Editor
nature 162, 887-888 (04 December 1948) | doi:10.1038/162887b0
Latitude Effect of Penetrating Cosmic Ray Showers
V. APPAPILLAI & A. W. MAILVAGANAM
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IT has been shown by Broadbent and Jánossy1 that penetrating cosmic ray showers are of two types: (a) local penetrating showers; (b) extensive penetrating showers. Local penetrating showers are supposed to be produced by primary nucleons, and they give rise to a transition effect which is proportional to mass. Extensive penetrating showers appear to be parts of extensive air showers. They show a strong transition effect in lead but almost none in paraffin.
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