Abstract
THERE are three kinds of experiments which seem to afford direct evidence regarding the nature of cosmic rays. These are: (1) the Bothe-Kolhörster double counter experiment, which compares the absorption of the particles traversing the counters with the absorption of cosmic rays; (2) measurements of the relative intensity of cosmic rays over different parts of the earth, designed to show any effect due to the earth's magnetic field; and (3) studies of the variation of cosmic ray intensity with altitude, which should follow different laws according as the rays are electrons or photons.
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COMPTON, A. Nature of Cosmic Rays*. Nature 131, 713–715 (1933). https://doi.org/10.1038/131713a0
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DOI: https://doi.org/10.1038/131713a0
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