Letter | Published:

Decay and Regeneration of Radio-luminescence

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Abstract

IT is well known that the luminescence produced in certain materials subjected to the action of the radioactive rays decreases with time and that the colour of the luminescence changes, while at the same time the material itself also changes in colour. From experimental work covering more than two years and still under way, we are led to believe that the decrease in luminescence of phosphorescent zinc sulphide, etc., is probably due to the masking of the radiation luminosity by the colour which the material acquires, due to the action of the radiation.

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