Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Ebe: Ọ kwagara na Institute for Theoretical Physics (nke mechara bụrụ Niels Bohr Institute) na Copenhagen na Sheldon Traveling Fellowship si Harvard, wee nọrọ na Denmark. N'afọ 1953 a họpụtara ya onye ọrụ na CERN's Theoretical Study Group, nke hiwere isi na Copenhagen, ọ bụ ọkwa ọ nọ ruo mgbe ọ ghọrọ prọfesọ na Nordic Institute for Theoretical Physics (Nordita) guzobere ọhụrụ na 1957. Ọ bụ prọfesọ na-eleta na Mahadum California, Berkeley n'oge opupu ihe ubi nke 1959. N'afọ 1971, ọ ghọrọ nwa amaala Denmark.  Ajụjụ: Olee mgbe ọ ghọrọ nwa amaala Denmark?
Afọ 1971