A Study of the Exciting Power for Fluroescence of the Different Parts of the Ult
A Study of the Exciting Power for Fluroescence of the Different Parts of the Ult
Leland Jaynes Boardman
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Cesium uranyl chloride, 2. Lithium uranyl acetate, 8. Potassium uranyl chloride, 3. Mercury uranyl acetate, 9. Potassium uranyl nitrate, 4. Strontium uranyl acetate, 10. Rubidium uranyl nitrate, 5. Uranyl acetate, 1 1. Cesium uranyl sulphate, 6. Sodium copper uranyl acetate, 12. Rubidium uranyl sulphate. Nichols and Howes 1 in their recent treatise entitled "Fluorescence of the Uranyl Salts" give a summary of results showing the distribution and character of the fluorescence spectrum and the ab...sorption spectrum of many uranyl compounds. It is shown that the spectrum of the fluorescent light consists of bands which naturally form eight groups of five members each, approximately, ranging from 640 m/z to 490 m/*, or thereabouts. The absorption spectrum consists also of bands having about the same arrangement, but ranging from 490 my to 380 mju, appar- ently a continuation of the fluorescence spectrum. The frequency inter- vals (reciprocal wave-length intervals) between homologous bands of each group are practically the same throughout the spectrum of either, the interval being about 86 in the fluorescence spectrum and about 70 in the absorption spectrum.
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