Dipole Moments of Highly Vibrationally Excited HCN: A New Approach to Ultra-sensitive Stimulated Emission Pumping

在这个由化学部实验物理化学计划资助的项目中，沃特克将使用一种新技术来研究多原子分子的高激发振动态，能量使它们接近反应势垒。氰化氢(HCN)将作为一个原型系统，利用受激发射泵浦和电六极聚焦相结合的技术进行研究，以获得单个高激发转动-振动态的能量和偶极矩信息。这些信息将有助于更好地绘制高激发态的波函数，特别是异构化转变的波函数。这个项目解决了当代物理化学中的一个主要问题，即分子处于激发态的特征，高到足以影响反应和异构化转变。两种不同的技术以一种新颖的方式结合在一起，以获得这种信息。对氰化氢分子原型的实验将扩展到其他系统。这项研究将为研究生和博士后研究员提供现代研究技术方面的良好培训。

In this project funded by the Experimental Physical Chemistry Program of the Chemistry Division, Wodtke will use a new technique to study highly excited vibrational states of polyatomic molecules, with energies that bring them close to the reaction barrier. Hydrogen cyanide (HCN) will be used as a prototype system and will be studied by the combined techniques of stimulated emission pumping and electric hexapole focusing to obtain energy and dipole moment information in individual highly excited rotation-vibrational states. Such information will serve to better map out the wavefunctions for highly excited states especially for isomerizing transitions.This project addresses a major problem in contemporary physical chemistry, namely the characterization of molecules in excited states, high enough to affect reactions and isomerization transitions. Two separate techniques are combined in a novel way to obtain such information. Experiments on the prototype hydrogen cyanide molecule will be extended to other systems. The research will provide excellent training for graduate students and postdoctoral fellows in modern research techniques.