THE ROLE OF SURFACE CORRUGATION IN DIRECT TRANSLATIONALLY ACTIVATED DISSOCIATIVE ADSORPTION
THE ROLE OF SURFACE CORRUGATION IN DIRECT TRANSLATIONALLY ACTIVATED DISSOCIATIVE ADSORPTION
复制标题
表面波纹在直接平移激活解离吸附中的作用
DOI：
10.1063/1.468424
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
James R Engstrom
中科院分区：
文献类型：
--
作者：
Lidong Xia;James R Engstrom
最近关于超热动能区反应散射的实验结果可以用能量标度关系Ei Cosn θi来描述，其中n<；2，Ei和θi分别是入射动能和入射角。这种幂定律标度论据是经验性的，其结果不容易与描述气体-表面相互作用的基本参数相关联。我们给出了详细而透彻的分析，其中明确地考虑了表面波纹在确定这些平移激活系统中入射动能和入射角之间的耦合中的作用。分析的主要特点包括假设沿局部表面法线(E⊥)方向的动能控制反应几率(SR)，并且通过在单位晶胞上取这个量的平均值，得到适当的能量标度关系。与所提出的分析相关联的主要优点是，人们不需要假设一个函数。
Recent experimental results concerning reactive scattering in the hyperthermal kinetic energy regime can be described by energy scaling relationships Ei cosn θi, where n<2, and Ei and θi are the incident kinetic energy and incident angle, respectively. Such power law scaling arguments are empirical, the results of which cannot easily be related to the fundamental parameters that describe the gas–surface interaction. We present a detailed and thorough analysis where the role of surface corrugation in determining the coupling between incident kinetic energy and incident angle in these translationally activated systems is considered explicitly. The key features of the analysis involve the assumption that the kinetic energy directed along the local surface normal (E⊥) controls the reaction probability (SR), and that by averaging this quantity over the unit cell, one obtains the appropriate energy scaling relationship. The major advantage associated with the proposed analysis is that one need not assume a func...