Molecular beam kinetics: Optical model for reactive scattering of alkali atoms and alkyl iodides
Molecular beam kinetics: Optical model for reactive scattering of alkali atoms and alkyl iodides
复制标题
分子束动力学：碱原子和烷基碘反应散射的光学模型
DOI：
10.1063/1.432476
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发表时间：
1976
期刊：
影响因子：
--
通讯作者：
D. Herschbach
中科院分区：
文献类型：
--
作者：
J. L. Kinsey;G. Kwei;D. Herschbach
在Rb和Cs原子的热束与烷基碘RI束反应中，测量了反应性散射碱金属碘的角分布，其中R= CH 3，C2 H5，n-和i-C3 H7，n-C4 H9和n-C5 H11。当预计从运动学差异的位移被考虑在内，定性功能被发现，以确认以前得到的类似K原子反应的结果。反应截面随碱金属原子的增大而增大，从K+ CH_3I的~（35）A_2增大到Rb的~（45）A_2和Cs的~（75）A_2。当K→Rb→Cs时，碱金属原子的弹性散射强度衰减也增大。产物的各向异性角分布、反应截面的大小以及K、Rb和Cs系统的广角弹性散射的下降与扩展的光学模型相关，该模型简单地假设入口和出口轨迹都是硬球相互作用。根据实验数据，利用...
Angular distributions of reactively scattered alkali iodides have been measured for reactions of thermal beams of Rb and Cs atoms with beams of alkyl iodides RI, where R=CH3, C2H5, n‐ and i‐C3H7, n‐C4H9, and n‐C5H11. When shifts expected from kinematic differences are taken into account, the qualitative features are found to confirm the results previously obtained for the analogous K atom reactions. The reaction cross sections increase with the size of the alkali atom, from ∼35 A2 for K+CH3I to ∼45 A2 for Rb and ∼75 A2 for Cs. The fall off in intensity of elastically scattered alkali atoms at wide angles also increases for K→Rb→Cs. The anisotropic angular distribution of products, the magnitude of the reaction cross section, and the fall off of the wide‐angle elastic scattering for the K, Rb, and Cs systems are correlated in terms of an extended optical model which simply assumes hard sphere interactions for both the entrance and exit trajectories. The reaction probability derived from the data by use of ...