Hugo Atterling's scientific memoir of Manne Siegbahn explains how apparatus and source composition shaped early X-ray spectroscopy. One example traces two unexpected lines in a 1914 spectrum to a silver layer beneath a platinum coating, observed in first and second diffraction orders. The account connects identification of a chemical element with the interpretation of the instrument, rather than treating each observed line as a new property of the nominal target. His memoir also documents the development of precision and vacuum spectrometers.[ref]
Manne Siegbahn, His Research by Hugo Atterling. Early work on X-ray spectroscopy; development of precision spectroscopy; authored memoir published 1991
Physics.[ref]
https://www.ne.se/uppslagsverk/skola/avancerad/hugo-atterling. Independent professional profile
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