. Carnegie Institution of Washington publication. 120 STUDIES IN LUMINESCENCE. manganese-sulphate preparation previously observed, which showed a band extending from to n, with a maximum at It would seem from these results that the manganese salts produce, when added to a cadmium salt, a phosphorescent compound whose spectrum shows the same maximum, and is independent of the salt. B ,\>H. Ct W Fig. 124. Showing top view of phosphoroscope. 94 1 1 \ 90 / \ / $ 85 in r Ob 01 -t- c / 82 / â j 1 IB 74 1 Wave leng h / 50 5^ 58 62 Fig. 126. Showing the phosphorescence spectr
. Carnegie Institution of Washington publication. 120 STUDIES IN LUMINESCENCE. manganese-sulphate preparation previously observed, which showed a band extending from to n, with a maximum at It would seem from these results that the manganese salts produce, when added to a cadmium salt, a phosphorescent compound whose spectrum shows the same maximum, and is independent of the salt. B ,\>H. Ct W Fig. 124. Showing top view of phosphoroscope. 94 1 1 \ 90 / \ / $ 85 in r Ob 01 -t- c / 82 / â j 1 IB 74 1 Wave leng h / 50 5^ 58 62 Fig. 126. Showing the phosphorescence spectrum of a CdS04-MnCl-2 compound, taken seconds after excitation. Of the sodium salts this is not true, for the colors are widely different. An attempt was made to measure the spectrum of all the sodium compounds, but'in most cases the intensity was far too small to measure. / +- \ "en c V ⢠+- f 474 / vVave Ien6 I 1 ° th 52 54 56 58 60 62 Fig. 125. Showing the phosphorescence spectrum of a Cd-Na2- Mn04 compound, taken second after excitation. 55 1 4 5 35 25 0 12 3 4- Seconds Fig. 127. Showing curve of decay of a CdSOj-NaBr compound. Decay curves were taken from all the compounds whose intensity was sufficient to measure. All these curves show the same characteristics when plotted with the reciprocal of the square root of the intensity as ordinates. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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