Abstract
THE relative ionisations produced in different gases by beams of X-rays have been found by many investigators to depend so markedly on the penetrating power of the X-rays used that no regularity in behaviour has been discovered (see Mr. Crowther's paper “On the Passage of Röntgen Rays through Gases and Vapours,” Roy. Soc. Proc., January 14).
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BARKLA, C. Ionisation by Röntgen Rays. Nature 80, 187 (1909). https://doi.org/10.1038/080187a0
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DOI: https://doi.org/10.1038/080187a0
