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出典:『Wikipedia』 (2011/05/08 17:41 UTC 版)

英語による解説

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Muonium is an exotic atom made up of an antimuon and an electron, which was discovered in 1960 and is given the chemical symbol Mu. During the muon's 2 µs lifetime, muonium can enter into compounds such as muonium chloride (MuCl) or sodium muonide (NaMu). Due to the mass difference between the antimuon and the electron, muonium (μ+
e−
) is more similar to atomic hydrogen (p+
e−
) than positronium (e+
e−
). Its Bohr radius and ionization energy are within 0.5% of hydrogen, deuterium, and tritium.