Formation of muonium and a muonic radical in fullerene |
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Authors: | E J Ansaldo J Boyle Ch Niedermayer G D Morris J H Brewer C E Stronach R S Cary |
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Institution: | (1) TRIUMF and Department of Physics, University of Saskatchewan, S7N 0W0 Saskatoon, Canada;(2) Fakultät für Physik, Universität Konstanz, W-7750 Konstanz, Federal Republic of Germany;(3) Department of Physics, University of British Columbia and TRIUMF, V6T 2A3 Vancouver, B.C., Canada;(4) Department of Physics, Virginia State University, 23803 Petersburg, VA, USA |
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Abstract: | Three distinct electronic states were detected for positive muons ( +) after implantation into a C60 powder sample. About 40% of the + remained in the bare ( diamagnetic ) state, essentially an interstitial charged point particle. The rest of the muons were found to thermalize predominantly in two muonium (Mu= + e–) atomic species. A vacuum Mu state, with hyperfine coupling close to that of free Mu, most likely at the molecular center, and a muonic substituted radical, i.e. a hydrogen-like Mu addition to double bonds on the carbon rings. This opens up a rich subfield of fullerene spectroscopy using muons. |
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