Ivar Waller

Ivar Waller ( born June 11, 1898 in Flender, † April 12, 1991 in Uppsala ) was a Swedish physicist and crystallographer. He was a professor at Uppsala University.

Waller studied physics at Uppsala University with the licentiate 's degree in 1922 and his doctorate in 1925 ( Theoretical studies of interference and dispersion theory of X-rays). He subsequently lecturer and from 1934 until his retirement in 1964 professor of mechanics and mathematical physics.

He is especially known for the Debye -Waller factor, for example, in X-ray crystallography ( together with Peter Debye ), which describes the thermal effect of lattice vibrations on the scattering ( at that time the quantum mechanical theory of lattice vibrations in particular by Max Born and Theodore von Karman been developed ). He came from his dissertation in 1925.

He was since 1945 a member of the Royal Swedish Academy of Sciences and was from 1945 to 1972 in the Nobel Committee for Physics. In 1938 he became a member of the Royal Society of Sciences in Uppsala, 1950, the physio Graphic Society in Lund and 1963 the Norwegian Academy of Sciences in Oslo. 1947 to 1965 he was a member of the Swedish National Council for Nuclear Research and in 1968/69 Director of the Swedish National Nuclear Engineering Society AB Atomenergi. In 1965 he became an honorary doctorate from Leiden University.

Among his students was Per- Olov Löwdin.