NEW MODEL OF ELECTRON-STIMULATED DESORPTION FROM PHYSISORBED MONOLAYERS - APPLICATION TO AR AND N2O ON RU(001)

被引：14

作者：

GORTEL, ZW ^{[1
]}

WIERZBICKI, A ^{[1
]}

机构：

[1] UNIV ALBERTA,INST THEORET PHYS,ADVADH BHATIA PHYS LAB,EDMONTON T6G 2J1,ALBERTA,CANADA

来源：

SURFACE SCIENCE | 1990年 / 239卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0039-6028(90)90219-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new model of electron stimulated desorption from monolayers physisorbed on metal surfaces is proposed in which the excited surface state potential is due to chemical rather than an image force acting on the adsorbed particle after the initial electronic excitation is completed. The equilibrium positions of the excited and the ground state potentials may nearly coincide and desorption is a purely quantum mechanical effect. It is demonstrated that, unlike for the commonly accepted Antoniewicz model, both the kinetic energy distributions of desorbing neutral particles and the total desorption yields calculated in the model proposed here are consistent with the existing experimental data for Ar and N2O physisorbed on Ru(001).

引用

页码：L565 / L570

页数：6

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