Abstract
WHEN a fast electron passes through matter, it loses its energy mainly by emission of a few large quanta of radiation (Bremsstrahlung). The radiation quanta are absorbed again, the absorption being due mainly to the creation of pairs. Thus, in a thick sheet of matter, a fast primary electron produces quite a number of secondary positive and negative electrons, which appear as a small shower giving rise to triple coincidences, etc.
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References
Bethe and Heitler, Proc. Roy. Soc., A, 146, 83 (1934).
Int. Conf. Nuclear Physics, London, 1934.
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BHABHA, H., HEITLER, W. Passage of Fast Electrons through Matter. Nature 138, 401 (1936). https://doi.org/10.1038/138401a0
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DOI: https://doi.org/10.1038/138401a0
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