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Theory of Vibrational Relaxation of R 2 ★ Centres in Rare‐Gas Solids. Application to Ne 2 ★
Author(s) -
Selg M.
Publication year - 1985
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221290238
Subject(s) - anharmonicity , vibrational energy relaxation , relaxation (psychology) , phonon , coupling (piping) , atomic physics , vibration , molecular vibration , materials science , rare gas , condensed matter physics , chemistry , physics , molecule , quantum mechanics , excited state , metallurgy , psychology , social psychology
A tunnel mechanism of vibrational relaxation is proposed for a class of emission centres which are characterized by a weak coupling to the crystalline environment and have vibrational quanta considerably exceeding phonon energies. For such kind of centres, e.g. for R 2 ★centres in solidified rare gases, a new relaxation channel, connected with the anharmonicity of vibrations, appears. The theory is applied to the centre Ne 2 ★in solid Ne: a direct calculation of the probabilities of vibrational transitions is carried out.