page_title: Ivar Waller
hierarchical_section_title: Ivar Waller
caption_attribution_description: English: Ivar Waller, honorary doctorate Leiden University July 1965
context_page_description: Ivar Waller was a Swedish professor of theoretical physics at Uppsala University. He developed the theory of X-ray scattering by lattice vibrations of a crystal, building upon the prior work of Peter Debye. The Debye–Waller factor, which he introduced in his doctoral thesis in 1925, is the definitive treatment of the effect of thermal vibrations in X-ray crystallography. He was a member of the Royal Swedish Academy of Sciences from 1945, and the Nobel Committee for Physics 1945-1972.
  One of his notable doctoral students was the quantum chemist Per-Olov Löwdin.
context_section_description: Ivar Waller (11 June 1898 – 12 April 1991) was a Swedish professor of theoretical physics at Uppsala University. He developed the theory of X-ray scattering by lattice vibrations of a crystal, building upon the prior work of Peter Debye. The Debye–Waller factor, which he introduced in his doctoral thesis in 1925, is the definitive treatment of the effect of thermal vibrations in X-ray crystallography. He was a member of the Royal Swedish Academy of Sciences from 1945, and the Nobel Committee for Physics 1945-1972.
  One of his notable doctoral students was the quantum chemist Per-Olov Löwdin.
caption: Ivar Waller (Leiden, 1965)
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