Abstract
THE structure of the silver lines 3280 A. and 3383 A. have been examined with Lummer plates by W. Mohammad and P. N. Sharma1 using a specially constructed vacuum arc. They report identical triplet structures of intensity ratio 5:5:1 and separations of 0.218 and 0.116 cm.-1 respectively, the weaker component being on the violetside. They therefore attribute this structure to the common 5s2S½ term, which, with a J value of ½ should only give a fine structure multiplicity 2J + 1 when J⋜I. A triplet could only arise if there were an isotopic displacement effect and provided the g (I) factors of the nucleii differed so that two of the four components superposed. In this somewhat unlikely event the intensity ratios should be very different from the values quoted above since the abundance ratio is unity. This, however, would not be a serious contradiction since it is well known that intensity measurements with resonance lines are necessarily unreliable owing to selfabsorption.
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Indian J. Phys., 6, 75 ; 1931.
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WILLIAMS, W., MIDDLETON, A. Fine Structure of the Resonance Ag I Lines. Nature 131, 692 (1933). https://doi.org/10.1038/131692a0
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DOI: https://doi.org/10.1038/131692a0
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