Abstract
WHAT is probably the most remarkable conclusion from the investigation of the J phenomenon is that two superposed X-radiations produce effects which are not the sum of those of the two constituent radiations, but are due to the compound radiation as a whole. It is not merely that a constituent of one radiation produces effects in atoms traversed when those atoms are exposed to the action of one or more constituents of the other beam; it is much more than that. The compound radiation, so far as the J phenomenon is concerned, behaves as an entity with properties of its own dependent upon (average) penetrating power and not on constituent wavelengths. This follows as a necessary consequence of the laws which we have found, and. have already stated (“The J Phenomenon in X-rays”, Phil. Mag., May 1925). We have, however, just obtained the most direct and convincing proof of this.
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BARKLA, C., MACKENZIE, G. The Coherence of Superposed X-Radiations. Nature 115, 942 (1925). https://doi.org/10.1038/115942a0
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DOI: https://doi.org/10.1038/115942a0
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