ROTATIONAL COOLING AND HEATING IN ACTIVATED ADSORPTION-DESORPTION FOR D2/CU(111)

被引：29

作者：

BRUNNER, T ^{[1
]}

BRENIG, W ^{[1
]}

机构：

[1] TECH UNIV MUNICH,DEPT PHYS,D-85747 GARCHING,GERMANY

来源：

SURFACE SCIENCE | 1994年 / 317卷 / 03期

关键词：

D O I：

10.1016/0039-6028(94)90286-0

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 consider a simple model for studying the rotational dynamics in a dissociative adsorption process (D2 at a Cu(111) surface). The experimentally detected decrease of the sticking coefficient with the initial rotational state j at low j and its increase at high j are accounted for. While the first effect is due to a dynamical reorientation of the molecule the latter effect can be traced back to an elongation of the molecular bond during dissociation. Depending on the surface temperature either rotational cooling or heating in desorption is to be expected.

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页码：303 / 308

页数：6

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