Family On 25 October 1920 he was married to Anna Petersen. They had three daughters and one son. Recognition Kramers became member of the Royal Netherlands Academy of Arts and Sciences in 1929, he was forced to resign in 1942. He joined the Academy again in 1945. Kramers won the Lorentz Medal in 1947 and Hughes Medal in 1951. Notes See also Chain reaction Kramers-Gaunt factor Spin (physics) Stark effect References External links H.B.G. Casimir, Kramers, Hendrik Anthony (1894–1952), in Biografisch Woordenboek van Nederland. (in Dutch) J.M. Romein, Hendrik Anthony Kramers, in: Jaarboek van de Maatschappij der Nederlandse Letterkunde te Leiden, 1951–1953, pp. 83–91. (in Dutch) Ph.D. candidates of H.A. Kramers: 1929-1952 Publications of H.A. Kramers 1894 births 1952 deaths 20th-century Dutch physicists Quantum physicists Academic staff of the Delft University of Technology Leiden University alumni Members of the Royal Netherlands Academy of Arts and Sciences Probability theorists Lorentz Medal winners Scientists from Rotterdam Presidents of the International Union of Pure and Applied Physics Members of the Royal Swedish Academy of Sciences