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Published October 1, 1979 | Published
Journal Article Open

Vibronic dephasing of anharmonic molecules. II. Impurity molecules isolated in low-temperature matrices


The quantum‐mechanical theory of vibronic dephasing presented in the first paper of this series is applied to the case of a diatomic impurity dissolved in a solid rare‐gas host. An explicit expression for the pure dephasing rate T_2′^(−1) is derived in terms of microscopic properties of the impurity and host, and the effects of variations in the parameters characterizing these properties are investigated. The expression for T_2′^(−1) is applied specifically to the system Cl_2/Ar in order to relate the results to those of previous classical‐trajectory calculations and of experimental measurements. The significance of anharmonicity in the intramolecular potential curve (of the impurity) is demonstrated.

Additional Information

© 1979 American Institute of Physics. Received 21 December 1978; accepted 28 June 1979. We thank the National Science Foundation for generous support of this work. We are also grateful to A. Baba for providing us with enough stimulation.

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