September 29 Birthday of James Watson Cronin – Nobel Prize Winner in Physics in 1980 James Watson Cronin Born 29 September 1931 (age 81) Chicago, Illinois, USA Nationality United States Fields Physics Institutions University of Chicago Alma mater Southern Methodist University University of Chicago (Ph.D.) Known for Nuclear physics Notable awards Nobel Prize in Physics John Price Wetherill Medal National Medal of Science James Watson Cronin (born September 29, 1931) 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 ofkaons, 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. Publications • Banner, M.; Cronin, J. W.; Liu, J. K.; & J. E. Pilcher. "Measurement of the Branching Ratio K{sub L} → γ γ ∕ K{sub L} → 3π{sup 0}", Palmer Physical Laboratory, Princeton University, United States Department of Energy (through predecessor agency theAtomic Energy Commission), (August 12, 1968). • Banner, M.; Cronin, J. W.; Liu, J. K.; & J. E. Pilcher. "Measurement of the Branching Ratio K{sub L} → 2π{sup 0} ∕ K{sub L} → 3π{sup 0}", Palmer Physical Laboratory, Princeton University, United States Department of Energy (through predecessor agency the Atomic Energy Commission), (August 14, 1968). • Cronin, J. W.; Frisch, H. J.; Shochet, M. J.; Boymond, J. P.; Mermod, R.; Piroue, P. A.; & R. L. Sumner. "Atomic Number Dependence of Hadron Production at Large Transverse Momentum in 300 GeV Proton--Nucleus Collisions", Enrico Fermi Institute, University of Chicago, Joseph Henry Laboratories, Princeton University, United States Department of Energy (through predecessor agency the Atomic Energy Commission), National Science Foundation, (July 15, 1974). • Brun, T. O.; Carpenter, J. M.; Krohn, V. E.; Ringo, G. R.; Cronin, J. W.; Dombeck, T. W.; Lynn, J. W.; & S. A. Werner."Measurement of Ultracold Neutrons Produced by Using Doppler-shifted Bragg Reflection at a Pulsed-neutron Source", Argonne National Laboratory, University of Chicago, University of Maryland, College Park, University of Missouri, United States Department of Energy, (1979). • Cronin, J. W.; Deshpande, N. G.; Kane, G. L.; Luth, V. C.; Odian, A. C.; Machacek, M. E.; Paige, F.; Schmidt, M. P.; Slaughter, J.; & G. H. Trilling. "Report of the Working Group on CP Violation and Rare Decays", University of Chicago, University of Oregon,University of Michigan, Stanford Linear Accelerator Center (SLAC), Northeastern University, Brookhaven National Laboratory (BNL),United States Department of Energy, (October 1984). Abraham J., Cronin J. W. et al, Observation of suppression of the Flux of Cosmic Rays above 4x10**19 eV., Phys Rev Letters vol 101, p 061101, (2008). Text: Wikipedia Photos: Internet Dr.A.Jagadeesh Nellore(AP),India
Posted on: Sat, 28 Sep 2013 17:59:38 +0000
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