Far Ultraviolet Resonance Raman Studies of Electronic Excitations

在化学部物理化学计划的这个项目中，Bruce Hudson将研究广泛的共轭和非共轭多烯以及选定的三原子的紫外共振拉曼光谱。关于将被收集的振动和电子基态和激发态的信息将与分子中光解离、光异构化和单分子反应等过程中的核/电子耦合机制有关。将发展实验方法，包括测定绝对拉曼强度，退偏比色散，可调激发，以及在蒸气中和基质隔离条件下目标物种的光化学产生。将建造一台新的紫外光谱仪，并将开发一种钛宝石激光器来产生可调谐的远紫外光辐射。%Hudson教授的研究小组开发了独特的光谱功能，可以研究由真空-紫外线光子从基电子能态激发的分子的初始运动。使用这些技术的实验可以为理解多原子分子高激发态下的能量流动和分子内动力学做出重要贡献。

In this project in the Physical Chemistry Program of the Chemistry Division, Bruce Hudson will study the UV resonance Raman spectra of a broad range of conjugated and non-conjugated polyenes and selected triatomics. Information about vibrational and electronic ground and excited states to be gathered will be related to the mechanism of nuclear/electron coupling in molecules in processes such as photodissociation, photoisomerization, and unimolecular reaction. Experimental methods involving the determination of absolute Raman intensities, depolarization ratio dispersion, tunable excitation, and photochemical generation of subject species in vapor and with matrix isolation will be developed. A new UV spectrograph will be constructed and a Ti:sapphire laser will be developed to produce tunable far-uv radiation. %%% Professor Hudson's research group has developed unique spectroscopic capabilities that allow the study of the initial motion of a molecule which has been excited by a vacuum- ultraviolet photon from its ground electronic energy state. Experiments using these techniques can make important contributions to the understanding of energy flow and intramolecular dynamics in the highly excited states of polyatomic molecules.