Phosphorescence caused by the beta and gamma rays of radium. | Zendy

George Thomas Beilby | Zendy; Joseph Larmor | Zendy

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Phosphorescence caused by the beta and gamma rays of radium.

Author(s) -

George Thomas Beilby,

Joseph Larmor

Publication year - 1905

Publication title -

proceedings of the royal society of london

Language(s) - English

Resource type - Journals

eISSN - 2053-9126

pISSN - 0370-1662

DOI - 10.1098/rspl.1904.0146

Subject(s) - barium , radium , phosphorescence , cyanide , radiochemistry , fluorescence , gamma ray , excited state , chemistry , nuclear medicine , materials science , optics , physics , inorganic chemistry , medicine , atomic physics , nuclear physics

1. Various observers have noticed that barium platino-cyanide, after continued exposure to the rays from radium, becomes brown or red, while the phosphorescence excited by the rays falls off considerably. The following observations were made with the object of ascertaining the conditions under which this change occurs. 2. A specimen of Merck’s barium platino-cyanide was recrystallized and obtained in prisms from 3 to 5 mm. long. The crystals were bright canary yellow and showed a pale blue fluorescence by obliquely reflected light.

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