Awards & Winners

James Cronin

Date of Birth 29-September-1931
Place of Birth Chicago
(Illinois, United States of America, Chicago metropolitan area, Area code 872)
Nationality United States of America
Also know as James Watson Cronin, James W. Cronin
Profession Physicist
James Watson Cronin is an American nuclear physicist. Cronin was born in Chicago, Illinois and attended Southern Methodist University in Dallas, Texas. Cronin and co-researcher Val Logsdon Fitch were awarded the 1980 Nobel Prize in Physics for a 1964 experiment that proved that certain subatomic reactions do not adhere to fundamental symmetry principles. Specifically, they proved, by examining the decay of kaons, that a reaction run in reverse does not merely retrace the path of the original reaction, which showed that the interactions of subatomic particles are not indifferent to time. Thus the phenomenon of CP violation was discovered. Cronin received the Ernest Orlando Lawrence Award in 1976 for major experimental contributions to particle physics including fundamental work on weak interactions culminating in the discovery of asymmetry under time reversal. In 1999, he was awarded the National Medal of Science. Cronin is Professor Emeritus at the University of Chicago and a spokesperson emeritus for the Auger project. Cronin is a member of the Board of Sponsors of The Bulletin of the Atomic Scientists.

Awards by James Cronin

Check all the awards nominated and won by James Cronin.


National Medal of Science for Physical Science
(For his fundamental contributions to the fields of elementary particle physics and astrophysics and his leadership in creating an international effort to determine the unknown origins of very high-energy cosmic rays.)


Nobel Prize in Physics
(for the discovery of violations of fundamental symmetry principles in the decay of neutral K-mesons.)