RichIsnang Posted March 27, 2012 Share Posted March 27, 2012 Why don't positrons annihilate with electrons in a cloud chamber? Link to comment Share on other sites More sharing options...
timo Posted March 27, 2012 Share Posted March 27, 2012 I'm pretty sure they do. Just not necessarily with the first electron the come close to. If I remember correctly, the probability of an electron and a positron annihilating with each other when they meet (whatever "meeting" may mean exactly for elementary particles) decreases with their relative velocity (or equivalently: relative momentum). So very fast positrons may (and apparently do) survive some distance before they react with electrons and vanish. Link to comment Share on other sites More sharing options...
RichIsnang Posted March 27, 2012 Author Share Posted March 27, 2012 Thanks timo Link to comment Share on other sites More sharing options...
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