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Tomonaga Sin'ichirō Edit Profile

朝永 振一郎


Tomonaga Sin'ichirō was a Theoretical physicist of the Showa period.


Tomonaga Sin'ichirō was born in Tikyo on 31 March 1906.


In 1929 graduated from Kyoto University. In 1932 he entered the Institute of Physical and Chemical Research, studying under Nishina Yoshio, and later went to Germany, where he studied under Werner Carl Heisenberg.


In 1941 he became a professor of the Tokyo University of Science and Literature, later known as the Tokyo University of Education.

From 1956 to 1962 he acted as president of the Tokyo University of Education and from 1963 to 1969 as head of the Science Council of Japan.

In 1948 he received a Japan Academy prize, in 1952 a Cultural Award, and in 1965 the Nobel Prize in physics.


  • He made important contributions to the study of the atomic nucleus, elementary particles, cosmic rays, electrical engineering, and the many-body problem, the last a problem lying on the borderline between nuclear physics and solid state physics. In 1943 he advanced the so-called super-many-time theory and in the years 1946 and 1947 set forth an expansion of it known as the renormalization theory.

    He has been active not only in research and education, but helped to establish joint research centers for nuclear and cosmic ray studies and, as a member of the Pugwash Conference and the Seven Man Committee for World Peace, has continually spoken out on problems of society and international peace.