INTRAMOLECULAR MOTION DURING STIMULATED SURFACE PROCESSES

被引：43

作者：

BURNS, AR ^{[1
]}

JENNISON, DR ^{[1
]}

STECHEL, EB ^{[1
]}

LI, YS ^{[1
]}

机构：

[1] BIOSYM TECHNOL INC,SAN DIEGO,CA 92121

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.72.3895

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ammonia and deuterated ammonia exhibit an anomalously large isotope effect in their relative yields and rotational spinning energy for electron-stimulated desorption from Pt(111). Quantum-resolved desorption measurements and ab initio, two-dimensional, potential energy calculations suggest that the desorbate undergoes a geometry change (molecular inversion) induced by the excited state. Inverted molecules deexcite to a repulsive hard wall potential and desorb. In general, multidimensional potential energy surfaces determine the dynamics of stimulated surface processes.

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页码：3895 / 3898

页数：4

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