After the war , from 1946 to 1952 , he worked at the Chalk River Nuclear Energy Laboratory in Ontario in nuclear physics research .
After the war , from 1946 to 1952 , he received a PhD degree in physics from McGill University in 1948 .
After the war , from 1946 to 1952 , he worked at the Chalk River Nuclear Energy Laboratory in Ontario in nuclear physics research and received a PhD degree in physics from McGill University in 1948 .