Ion-Molecule Collision Dynamics at Translational Temperatures Below 30 K

这项研究是实验物理化学计划的一部分，旨在研究低于30开尔文的平移温度下离子-分子碰撞动力学。实验结果将使用统计相空间模型进行分析。所获得的知识将提供对长寿命碰撞复合物动力学特性的深入了解，并将适用于星际空间分子合成的分析。在超音速射流膨胀的核心内发生的反应的绝对速率常数将被测量。该方法采用自由射流膨胀的过渡流区作为动力介质。为了得到反应物的旋转态分布，将建立多原子射流的微观演化模型。

This research, part of the Experimental Physical Chemistry Program, is designed to study ion-molecule collision dynamics at translational temperatures below 30 degrees Kelvin. The experimental results will be analyzed using statistical phase space models. The knowledge gained will provide insight into the dynamical properties of long-lived collision complexes and will be applicable to the analysis of molecular synthesis in interstellar space. Absolute rate constants of reactions occurring within the core of supersonic jet expansions will be measured. The method uses the transition flow region of a free jet expansion as the kinetic medium. Microscopic evolution models for polyatomic jets will be developed in order to obtain the rotational state distribution of the reactants.