The hyper‐Raman effect in molecular gases
The hyper‐Raman effect in molecular gases
复制标题
分子气体中的超拉曼效应
DOI：
10.1002/jrs.1250120102
复制
发表时间：
1982
期刊：
影响因子：
--
通讯作者：
G. Strey
中科院分区：
文献类型：
--
作者：
K. Altmann;G. Strey
本文综述了分子气体中超喇曼效应的理论。为了计算超拉曼光谱中振转谱线的相对强度，引入谱线强度，并用不可约球张量方法计算谱线强度。结果表明，由准单色光散射引起的超喇曼效应可以用五个独立的谱线强度表达式来描述。推导并讨论了线偏振光、圆偏振光和自然偏振光的转动和振动选择定则以及退偏比。散射强度的角度依赖性也给出了极坐标图的形式。在某种程度上，本文提出的平行，发表了由Placzek和Teller 54在1933年的旋转结构的振动带在传统的拉曼光谱引起的自发双光子散射过程。
The theory of the hyper-Raman effect in molecular gases is reviewed. In order to calculate relative intensities of vibration-rotation lines in hyper-Raman spectra, line strengths are introduced and these are calculated using the method of irreducible spherical tensors. It transpires that the hyper-Raman effect caused by scattering of a quasi-monochromatic light beam can be fully described by five independent line strength expressions. Rotational and vibrational selection rules as well as depolarization ratios for linearly, circularly and naturally polarized incident light are derived and discussed. The angular dependence of the scattered intensity is also given in the form of polar diagrams. To some extent the paper presented here parallels that published by Placzek and Teller54 in 1933 on the rotational structure of vibrational bands in conventional Raman spectra caused by a spontaneous two-photon scattering process.