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Is the Momentum a Sufficient Description of a Photon or an Electron? The apparent contradiction between the results given by the pairs and the negative electrons in the case of the Li+H' radiation has been pointed out in the preceding letter. If this cannot be explained by means of our present knowledge of absorption coefficients, etc., the only alter- native seems to be to discuss the possibility that the photons responsible for the 17.5 Mev group differ, in some way besides in their quantum energy, from those re- sponsible for the lower groups of electrons, and in such a way as to affect radically the ratio of the pair and Klein- Nishina absorption coefficients. In searching for a possible reason for such a difference, we see that the matter of frequency can hardly be important, since its relative change is small, especially in going from the 17.5 Mev to the 14.5 or even to the 11 Mev line. The only thing which can be radically different for the various lines is the time of emission of the photon; in other words the length of the photon wave train. This might easily differ by a factor of 100 or
Physical Review – American Physical Society (APS)
Published: Jan 1, 1937
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