Linear and Nonlinear Resonance Raman Studies of Photo- dissociation

在实验物理化学计划的支持下，Ziegler教授正在开发和使用新的拉曼光谱技术来研究小多原子分子中光解过程的动力学，其分辨率足以检测单个转动-振动能级。齐格勒的实验和理论工作扩展了我们对光解过程及其随初始制备态的能量和量子数的变化的详细理解。以前开发的旋转共振拉曼技术被用来测量短寿命(20飞秒到5皮秒)准束缚激发态能级的转动量子比寿命。共振超拉曼正在将这项工作扩展到真空紫外光中的解离分子激发态，通过近紫外光光子的双光子过程可以到达。计划中的工作还包括使用共振相干反斯托克斯拉曼光谱(CARS)来实现更大的旋转量子分辨率，并允许研究更大的分子。

With support from the Experimental Physical Chemistry Program, Professor Ziegler is developing and using novel Raman spectroscopic techniques to investigate the dynamics of photodissociation processes in small polyatomic molecules at a resolution sufficient to examine individual rotational-vibrational levels. Ziegler's experimental and theoretical work is expanding our detailed understanding of the photodissociation process and its variation with the energy and quantum numbers of the initially prepared state. Previously developed rotational resonance Raman techniques are being used to measure rovibrational quantum specific lifetimes of short-lived (20 femtoseconds to 5 picoseconds) quasi-bound excited state levels. Resonance hyper-Raman is extending the work to dissociative molecular excited states in the vuv accessible via two-photon processes with near-uv photons. Planned work also includes the use of resonant Coherent Anti-Stokes Raman Spectroscopy (CARS) to achieve greater rotational quantum resolution and allow the study of larger molecules.