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Følgende artikellæsning kræver lidt gratis registrering:

Sep 12, 2007 Matter-antimatter molecule makes its debut:
http://physicsworld.com/cws/article/news/31125
Citat: "... Dubbed “dipositronium”, it contains two electrons and two
positrons that are bound together in much the same way as molecular
hydrogen...."

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http://da.wikipedia.org/wiki/Elektron

hilsen

Glenn