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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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When Opposites Attract the Nobel Prize
3 February 1999 7:00 pm
This week would have marked the 94th birthday of physicist Emilio Segrè, discoverer of the antiproton. The Italian-born American physicist, who died in 1989, studied proton-proton and proton-neutron interactions at the cyclotron accelerator in Berkeley, California. In the early 1950s, Segrè used the Bevatron to accelerate protons to 6 billion electron volts and smash them into a metal plate. The collisions yielded a negatively charged beam composed mainly of pions, muons, and electrons. Segrè also detected in the beam the faint presence of antiprotons--a discovery that earned him and colleague Owen Chamberlain the 1959 Nobel Prize in physics. The existence of antiprotons had been predicted 20 years earlier by physicist Paul Dirac.
[Source: Roy Porter, Ed., The Biographical Dictionary of Scientists (Oxford University Press, ed. 2, 1994).]