Probing Torsional Potential Surfaces Through Two-Photon Jet Spectroscopy of Ryberg States

9313875古德曼在化学系物理化学项目中，罗格斯大学化学系的莱昂内尔·古德曼教授将利用里德伯格和泽克(零动能)光谱技术研究一些分子中的甲基内部旋转运动。我们将获得基态、自由基阳离子和激发里德堡态的扭转势垒的形状和高度，以便为检验内旋势的分子模型提供数据。分子中甲基的扭转运动目前正在被深入研究，因为它们为分子内振动能量重新分配(IVR)问题提供了洞察力。通过激光激发控制化学反应的目标需要了解激发能量如何流入各种可能的反应通道。甲基扭转运动可以在光谱的可及区域内研究，为跟踪IVR提供了一个一维的理论模型。***

9313875 Goodman In this project in the Physical Chemistry Program of the Chemistry Division, Prof. Lionel Goodman of the Department of Chemistry of Rutgers University will study the methyl group internal rotational motions in a number of molecules using the techniques of Rydberg and ZEKE (Zero Kinetic Energy) spectroscopy. The shapes and heights of the torsional potential barriers in the ground-, radical cation-, and excited Rydberg states will be obtained in order to provide data for testing molecular models for internal rotation potentials. %%% The torsional motions of methyl groups in molecules are presently under intensive investigation for the insight that they provide to the problem of intramolcular vibrational energy redistribution (IVR). The goal of controlling chemical reactions by laser excitations requires an understanding of how the excitation energy flows into various possible reaction channels. Methyl group torsional motions can be studied in an accessible region of the spectrum and offer a one dimensional theoretical model for tracking IVR. ***