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Kai Siegbahn
Born 20 April 1918(1918-04-20)
Died 20 July 2007 (aged 89)
Nationality Sweden
Fields Physics
Institutions University of Stockholm
University of Uppsala
Alma mater University of Stockholm
Known for high-resolution electron spectroscopy
Notable awards Nobel Prize in Physics (1981)

Kai Manne Börje Siegbahn (20 April 1918 – 20 July 2007) was a Swedish physicist.[1]

He was born in Lund, Sweden, and his father Manne Siegbahn also won the Nobel Prize in Physics, in 1924. Siegbahn earned his doctorate at the University of Stockholm in 1944. He was professor at the Royal Institute of Technology 1951-1954, and then professor of experimental physics at Uppsala University 1954-1984, which was the same chair his father had held. He shared the 1981 Nobel Prize in Physics with Nicolaas Bloembergen and Arthur Schawlow for their work in spectroscopy.

Siegbahn obtained the Nobel Prize for developing the method of Electron Spectroscopy for Chemical Analysis (ESCA), now usually described as X-ray photoelectron spectroscopy (XPS). At the time of his death he was still active as a scientist at the Ångström Laboratory at Uppsala University.


Kai Siegbahn was one of the original editors of the Encyclopedia of Analytical Chemistry


  1. ^ "Kai Siegbahn, Swedish Physicist, Dies at 89.". New York Times. August 7, 2007. "Kai Siegbahn, a Swedish physicist whose work in developing a novel technique using electrons to test the composition and purity of materials won a Nobel Prize in 1981, died on July 20. He was 89 and had been visiting his summer home in Ängelholm, in southern Sweden."  

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