TIME-DEPENDENCE OF THE DEPOLARIZATION RATIO IN PICOSECOND TIME-RESOLVED RAMAN-SPECTROSCOPY - EFFECT OF REORIENTATION

被引：17

作者：

IWATA, K ^{[1
]}

WEAVER, WL ^{[1
]}

GUSTAFSON, TL ^{[1
]}

机构：

[1] OHIO STATE UNIV,DEPT CHEM,COLUMBUS,OH 43210

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 210卷 / 1-3期

关键词：

D O I：

10.1016/0009-2614(93)89098-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In picosecond time-resolved Raman spectroscopy, the depolarization ratio is expected to change as the time delay is varied if an anisotropy distribution of the excited state is introduced by using linearly polarized pumping light and the time resolution of the measuring system is shorter than the reorientation lifetime. The time dependence of the depolarization ratios for two intense Raman bands of trans-stilbene in the first singlet excited (S1) state was measured to demonstrate this effect. The results are explained well by a simple model that assumes the alignment of the S1 distribution and its subsequent randomization.

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页码：50 / 54

页数：5

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