Studies of intramolecular and photoionization dynamics through the technique of time-resolved photoelectron imaging

皮秒激光脉冲(泵浦)将被用来制备一系列处于电子激发态的小分子，而延时激光脉冲(探针)将被用来电离被激发的分子。将采用泵浦光束和探测光束的各种偏振组合。发射的光电子将通过速度图成像技术进行探测。时间分辨的图像将使用计算方法进行分析和解释，从而能够确定关于分子内和光致电离动力学的信息。特别是，这些实验可以提取定量信息，如耦合系数、本征态能量分离和矩阵元素，以及洞察促进有效能量重新分配的“门道态”的身份。它们还可以提供光电子波函数的分波组成的细节。相关分子系统之间的比较使进一步的机理细节得以推断。

A picosecond laser pulse (the pump) will be used to prepare a series of small molecules in electronically excited states and a time-delayed laser pulse (the probe) then used to ionize the excited molecules. Various combinations of the polarization of the pump and probe beams will be employed. The emitted photoelectrons will be detected through the technique of velocity map imaging. The time-resolved images will be analysed and interpreted using computational methods, enabling information on intramolecular and photoionization dynamics to be determined. In particular, these experiments can enable the extraction of quantitative information such as coupling coefficients, eigenstate energy separations and matrix elements, as well as insight into the identities of "doorway states" that promote efficient energy redistribution. They can also provide details of the partial wave composition of the photoelectron wavefunction. Comparisons between related molecular systems enable further mechanistic detail to be deduced.