Molecular Collision Dynamics: State Resolved Studies by "Half-Collision" Techniques

教授Kleiber，Stwalley和Sando是由 实验物理化学计划在一个合作 远翼激光器的实验和理论研究 吸收导致化学反应和各种非弹性 碱金属与氢分子相互作用的过程。 远翼吸收技术是探测 直接影响了通常寿命很短的 反应物之间的中间或过渡区域， 化学转化中的产物。 一种激光器，从允许的或允许的频率稍微偏离共振， 碱金属的禁戒原子跃迁被用来 远距离泵送碰撞的碱-氢“中间体” 适合于非共振光子的共振吸收。 随后分支到各种产品渠道， 作为激光失谐量的函数，通过 发射测量或激光诱导荧光。 的 特别感兴趣的是阈值附近的反应动力学， 自旋轨道耦合对动力学的影响。 理论治疗强调近似经典 包括原子核的完整运动的路径方法。 半经典谱线展宽的推广和推广 理论正在探索中。

Professors Kleiber, Stwalley, and Sando are supported by the Experimental Physical Chemistry Program in a collaborative experimental and theoretical investigation of far-wing laser absorption leading to chemical reaction and various inelastic processes in alkali metal interactions with hydrogen molecules. The far wing absorption technique is one way in which to probe directly the properties of the usually very short-lived intermediate or transition region between reactants and products in a chemical transformation. A laser tuned slightly off-resonance from an allowed or a forbidden atomic transition of an alkali metal is being used to pump colliding alkali-hydrogen "intermediates" at distances suitable for resonant absorption of the off-resonance photon. The subsequent branching into various product channels is monitored, as a function of the amount of laser detuning, by either emission measurements or laser-induced fluorescence. Of particular interest are reactions dynamics near threshold and the influence of spin-orbit coupling on the dynamics. Theoretical treatments are emphasizing approximate classical path methods that include the full motion of the nuclei. Extensions and generalizations of semiclassical line-broadening theories are being explored.