Quantum tunnelling of muonium via radical states in molecular solids

Dr Francis Pratt, Dr Stephen Cottrell, Dr Leandro Liborio, Dr Matteo Aramini, Professor Tom Lancaster, Mr Benjamin Huddart & Dr Francis Pratt
The extreme quantum nature of muons and muonium in condensed matter is the result of having a mass that is nine times lighter than that of a hydrogen atom. While this quantum nature may often be masked by thermal excitations, at low temperatures its effects can become more apparent. This was clearly demonstrated in solid benzene ALC spectra below 120 K, where both intramolecular and intermolecular multisite quantum tunnelling of radical states was observed. Selective...
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