Mottelson, Ben(jamin) Roy 1926-
Danish physicist and Nobel Prize winner

Born in Chicago, USA, he was educated at Purdue University and Harvard. From Harvard he moved to the Institute of Theoretical Physics in Copenhagen (now the Niels Bohr Institute), where he worked with Aage Bohr on the problem of combining the two models of the atomic nuclei. They secured experimental evidence in support of James Rainwater's collective model of the atomic nuclei and Bohr, Mottelson and Rainwater shared the 1975 Nobel Prize for physics. From 1953 to 1957 Mottelson held a research position in CERN (Conseil Europ�en pour la Recherche Nucl�aire) before returning to Copenhagen where he became professor at Nordita (Nordic Institute for Theoretical Atomic Physics). He took Danish nationality in 1973.