Visit this site, from "Physical Review Focus," to learn about the 1932 discovery of the positive electron, or positron, the first particle of antimatter identified. You'll see how Carl Anderson found tracks of positrons in his cosmic ray research with cloud chambers, and how he concluded that they were positive electrons. Also, you'll find out how the positron had already been predicted when Anderson found it.
%0 Electronic Source %D August 25, 2006 %T Antimatter: Mirror of the Universe %I American Physical Society %V 2015 %N 4 March 2015 %8 August 25, 2006 %9 text/html %U http://physics.aps.org/story/v17/st5
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