True Quantum-State to Quantum State Chemistry: The Detailed Differential Cross-Section for the Unimolecular Decomposition of Group IV Hydrides

在这个项目中，在实验物理化学计划的 化学系教授Delroy Baugh 位于洛杉矶的加州大学将对 氨和磷化氢的态-态化学反应动力学。 一个 静电六极场将用于制备分子束， 这些物质处于单一的旋转振动状态， 在量子力学允许的范围内。 国 选定的分子被激发到不稳定的势能面 导致衰变成碎片，这些碎片随后被分析以产生 反应的详细微分截面。 本研究的目的是确定 控制基本化学反应的能量表面。 分子最初是以定义明确的量子态制备的， 允许详细跟踪反应过程。 这些实验 这是第一个将氢以外的分子 研究完整的状态-状态反应动力学的学科。 这项工作的结果将在验证中发挥重要作用 分子水平上的化学反应的现有理论。

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, Prof. Delroy Baugh of the Chemistry Department of the University of California at Los Angeles will conduct experiments on the state-to-state chemical reaction dynamics of ammonia and phosphine. An electrostatic-hexapole field will be used to prepare molecular beams of these species in single, rotation-vibrational states that are completely specified within the limits allowed by quantum mechanics. The state selected molecules are excited to an unstable potential energy surface causing decay into fragments which are subsequently analyzed to yield detailed differential cross sections for the reaction. This resesrach is directed toward the determination of the potential energy surface which controls an elementary chemical reaction. Molecules are initially prepared in well defined quantum states which allow detailed tracking of the reaction process. The experiments to be performed are the first in which molecules other than hydrogen will be subject of investigation of complete state-to-state reaction dynamics. The results of this work will play a significant role in validating existing theories of chemical reactions on the molecular level.