Karl Manne Georg Siegbahn
1886 – 1978
Who was Karl Manne Georg Siegbahn?
Siegbahn was born in Örebro, Sweden. He obtained his Ph.D. at the Lund University in 1911, his thesis was titled Magnetische Feldmessungen. He was acting professor for Johannes Rydberg when his health was failing, and succeeded him as full professor in 1920.
Following his Ph.D., he started research on X-ray spectroscopy. This work continued when he moved to the University of Uppsala in 1923. He developed improved experimental apparatus which allowed him to make very accurate measurements of the X-ray wavelengths produced by atoms of different elements. He developed a convention for naming the different spectral lines that are characteristic to elements in X-ray spectroscopy, the Siegbahn notation. Siegbahn's precision measurements drove many developments in quantum theory and atomic physics.
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