Abstract
SCREENING and spin doublets in X-ray spectra are matters of great significance. The formation of these doublets in X-ray diagram lines is now well known and has received satisfactory theoretical interpretation. The situation regarding the X-ray satellite spectra is, however, somewhat different. The formation of screening doublets in these spectra was first pointed out by G. B. D.1 as early as 1931 and later fully substantiated in a number of communications2–4 from the X-ray laboratories of the University of Allahabad. The overall similarity in the behaviour of the screening doublets shown by the X-ray diagram and non-diagram lines suggests the formation of the spin doublets in X-ray satellite spectra, and our critical analysis of the existing data for the various X-ray satellites has fulfilled this expectation.
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