Ben Roy Mottelson was born on July 9, 1926.

Ben Roy Mottelson was born on July 9, 1926.

Ben Roy Mottelson won The Nobel Prize in Physics in 1975.

Danish-American physicist Ben Roy Mottelson is 91 years old (birthdate: July 9, 1926).

The Nobel Prize in Physics 1975 was awarded jointly to Aage Niels Bohr, Ben Roy Mottelson and Leo James Rainwater for the discovery of the connection between collective motion and particle motion in atomic nuclei and the development of the theory of the structure of the atomic nucleus based on this connection.