Abstract
MAY I place on record what is, I think, the most direct evidence that the modified scattered radiation is due to the super-position of unmodified scattered radiations? When using a certain primary X-radiation, the scattered radiation from air was found to be totally unmodified radiation, i.e. a radiation with accurately the same absorbability as the primary radiation exciting it. The radiation scattered from paper or paraffin-wax was very definitely a modified scattered radiation, or contained a modified radiation, i.e. differed considerably in absorbability from the primary radiation. Also these two radiations scattered from paper and from paraffin-wax were equally modified—within a small possible error.
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BARKLA, C. Modified Scattered X-Radiation due to Super-Position. Nature 119, 778–779 (1927). https://doi.org/10.1038/119778b0
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DOI: https://doi.org/10.1038/119778b0
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