Time-of-Flight Analysis and Laser Induced Fluorescence Studies of Ultraviolet Multiphoton Dissociation at 157 and 193 nm

杰克逊教授的小组得到了实验研究所的支持。 物理化学计划在多方面的调查 紫外多光子解离过程 多原子分子 这项工作试图描述 一些潜在的基本过程发生在这样的 复杂的激光诱导化学环境。 正在研究的分子，如乙炔，丙二烯， 和甲基乙炔，在脉冲分子中膨胀 在紫外光解离之前的光束。 产物片段 正在被各种技术分析。 量子态 分布由激光诱导荧光确定， 时间分辨红外发射测量。 的角度和 氢原子碎片的能量分布 通过共振双光子泵浦到里德堡能级来检测 光解离区，随后是时间分辨检测 一个遥远的电离区 小的双原子碎片可以 也可以用这些飞行时间技术来检查。

Professor Jackson's group is supported by the Experimental Physical Chemistry Program in a multifaceted investigation of ultraviolet multiphoton dissociation processes in small polyatomic molecules. This work is attempting to characterize some of the underlying basic processes that occur in such complex laser-induced chemical environments. The molecules being investigated, such as acetylene, allene, and methylacetylene, are being expanded in a pulsed molecular beam prior to ultraviolet photodissociation. Product fragments are being analyzed by various techniques. Quantum state distributions are determined by laser induced fluorescence and time-resolved infrared emission measurements. The angular and energy distributions of hydrogen atom fragments are being detected via resonant two-photon pumping to Rydberg levels in the photodissociation zone, followed by time-resolved detection at a distant ionization zone. Small diatomic fragments can also be examined with these time-of-flight techniques.