Grazing incidence scattering of vibrationally excited H2 molecules from metal surfaces

被引：7

作者：

Stradi, D. ^{[1
,2
]}

Diaz, C. ^{[1
]}

Martin, F. ^{[1
,2
]}

机构：

[1] Univ Autonoma Madrid, Dept Quim Modulo 13, E-28049 Madrid, Spain

[2] IMDEA Nanociencia, Madrid 28049, Spain

来源：

SURFACE SCIENCE | 2010年 / 604卷 / 21-22期

关键词：

Grazing incidence; Quasi-classical dynamics; Vibrationally excitation; Reflectivity; POTENTIAL-ENERGY SURFACE; DISSOCIATIVE CHEMISORPTION; 6-DIMENSIONAL DYNAMICS; H-2; DIFFRACTION; CU(111);

D O I：

10.1016/j.susc.2010.08.017

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：

We have studied the scattering of vibrationally excited H-2 molecules from metal surfaces under fast grazing incidence conditions, by means of quasi-classical calculations based on six-dimensional potential energy surfaces. We show that, in spite of the fast parallel motion, the reorientation of the molecule along the trajectory plays a fundamental role on the scattering, being responsible for the nonmonotonic behavior observed as a function of the normal incidence energy, similar to that observed under slow normal incidence conditions. The present study has allowed us to further prove that the interaction between a H-2 molecule and an ordered metal surface under fast grazing incidence conditions is, in general, governed by the normal momentum of the molecule. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2031 / 2035

页数：5

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