Vibronic dephasing of anharmonic molecules. I. Theory and its application to the separability of intra‐ and intermolecular processes
Vibronic dephasing of anharmonic molecules. I. Theory and its application to the separability of intra‐ and intermolecular processes
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非简谐分子的振动相移 I. 理论及其在分子内和分子间过程可分离性中的应用
DOI：
10.1063/1.438717
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发表时间：
1979
影响因子：
4.4
通讯作者：
A. Zewail
中科院分区：
文献类型：
--
作者：
D. J. Diestler;A. Zewail
本文提出了一个关于凝聚介质中杂质分子振动退相的量子力学理论。退相时间的表达式推导出表现出明确的依赖于杂质和介质的微观性质。该表达式，其中包含的温度依赖性和截面的退相，是用来定性和半定量预测固体中的振动光谱线的一些功能。特别感兴趣的是这样的系统，其中（杂质的）分子内性质对移相的影响与（介质的）分子间性质的影响是可分离的。振动和纯电子的振动退相的影响之间的区别也被强调。
A quantum‐mechanical theory of vibronic dephasing of impurity molecules in condensed media is presented. An expression for the dephasing time is derived that exhibits explicit dependences upon microscopic properties of both impurity and medium. The expression, which contains the temperature dependence and the cross section for dephasing, is used to predict qualitatively and semiquantitatively some features of vibronic spectral lines in solids. Of particular interest are systems in which the influence of intramolecular properties (of the impurity) upon dephasing is separable from that of intermolecular properties (of the medium). The distinction between vibrational and purely electronic effects on vibronic dephasing is also emphasized.