[en] This biography has chapters dealing with: artificial disintegration of the elements (the experiments with the Cockcroft-Walton accelerator); history of development of nuclear energy in United Kingdom and Canada (covering the wartime period of cooperation between the US, UK and Canada, and the postwar period of the development of nuclear power in the UK, the setting up of the Atomic Energy Research Establishment, Harwell, and the early history of the UK Atomic Energy Authority); international cooperation in the field of atomic energy (as well as in other fields of scientific work). (U.K.)