Abstract
IN the current theories and experiments, the question whether a cosmic ray shower is produced in a single elementary process or rather in a succession of many elementary processes is still open to discussion. For example, the discussions of Geiger and Fünfer1, and of Bhabha and Heitler2 are based on the latter idea, while that of Heisenberg3 represents the former point of view. In the first case, the shower contribution from different layers of producing material would be linear to its thickness, provided the latter is sufficiently small, while in the second case, on the contrary, a quadratic relation between the shower frequency and the thickness is to be expected.
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References
Geiger, H., and Fünfer, E., Z. Phys., 93, 543 (1935).
Bhabha, H. J., and Heitler, W., NATURE, 138, 401 (1936).
Heisenberg, W., Z. Phys., 101, 533 (1936).
Morgan, J. E., and Nielsen, W. M., Phys. Rev., 48, 773 (1935).
Watase, Y., and Kikuchi, S., Proc. Phys.-Math. Soc. Japan, 18, 210 (1936).
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WATASE, Y. Cosmic Ray Showers. Nature 139, 671–672 (1937). https://doi.org/10.1038/139671b0
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DOI: https://doi.org/10.1038/139671b0
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