Abstract
SINCE the fluorescence and phosphorescence of sodium chloride are extremely weak in the ultraviolet, there have been few investigations of them until now1. Our measurements were carried out by a very sensitive photon counter. Samples of clear sodium chloride crystals were exposed to X-rays of 50 kv. and then irradiated by visible light for periods of a few seconds. Investigating the radiations of such crystals with the photon counter, we found a distinct ultra-violet phosphorescence which is remarkably changed if the crystal is plastically deformed.
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R. Hilsch and R. Pohl, Götting. Nach., 46, 322 (1933); 52, 406 (1933); 1, 115 (1934).
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SCHEIN, M., KATZ, M. Ultra-violet Luminescence of Sodium Chloride. Nature 138, 883 (1936). https://doi.org/10.1038/138883a0
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DOI: https://doi.org/10.1038/138883a0
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