Abstract
IT is well known that the edges of X-ray absorption spectra are very often accompanied by secondary edges on the short wave-length side. For this phenomenon the following explanation has been proposed (D. Coster, Zs. f. Phys., 25, 83; 1924: A. Sommerfeld, “Atombau”, fourth German edition, p. 326 ; 1924). Whereas the main edge in the case of the K-absorption line corresponds to the transition of the K-electron just to the outside of the atom, the secondary edges should correspond to a simultaneous transition of a K-electron and an outer electron by one single absorption act.
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COSTER, D., WOLF, M. The Fine Structure of X-ray Absorption Edges. Nature 124, 652–653 (1929). https://doi.org/10.1038/124652a0
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DOI: https://doi.org/10.1038/124652a0
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