Abstract
REGENER1 has found that cosmic rays can be observed at 230 m. below the level of Lake Constance. If these rays, as is generally assumed, consist of electrons (not of protons) the great penetrating power raises a serious difficulty in the adopted theory of electronic motion, that is, Dirac's equation. Using this equation, Heitler and Sauter2 have shown that a beam of very fast electrons (with an energy E 200 mc2) should penetrate not more than 1 m. of water when all kinds of absorption processes are taken into account.
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References
E. Regener, Phys. Z., 34, 306; 1933.
W. Heitler, and F. Sauter, NATURE, 132, 892, Dec. 9, 1933.
NATURE, 132, 282, Aug. 19, 1933.
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BORN, M. Cosmic Rays and the New Field Theory. Nature 133, 63–64 (1934). https://doi.org/10.1038/133063b0
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DOI: https://doi.org/10.1038/133063b0
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