Research Papers in Physics and Astronomy


Date of this Version

December 1968


Published in Phys. Rev. 170, 391 - 396 (1968). Copyright ©1968 The American Physical Society. Used by permission. Online at URL:


The product of two empirical relations, for the practical range and the transmission probability of normally incident electrons through plane sheets of matter, may be differentiated to yield a simple formulation of the energy deposition by electron beams, in agreement with more complex formulations and with experimental data. When combined with the δ-ray distribution formula, these results provide a theory of the spatial distribution of ionization energy about the path of a rapidly moving ion, which is basic to theories of radiation damage and detection.

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