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

通过时间分辨光电子成像技术研究分子内和光电离动力学

• 批准号: 2115965
• 金额: --
• 依托单位: University of Nottingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2115965
• 关键词: Studies; intramolecular; photoionization; dynamics; through

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.

一个皮秒激光脉冲（泵浦）将用于制备一系列处于电子激发态的小分子，然后一个延时激光脉冲（探针）用于激发激发分子。将采用泵浦光束和探测光束的偏振的各种组合。发射的光电子将通过速度图成像技术进行检测。将使用计算方法分析和解释时间分辨图像，从而确定分子内和光电离动力学信息。特别是，这些实验可以使定量信息的提取，如耦合系数，本征态能量分离和矩阵元素，以及洞察到的身份“门口状态”，促进有效的能量再分配。它们还可以提供光电子波函数的分波组成的细节。相关的分子系统之间的比较，使进一步的机制细节推导。