Survival of HCl(ν=2) in trapping-desorption from MgO(100)

被引：16

作者：

Korolik, M ^{[1
]}

Suchan, MM ^{[1
]}

Johnson, MJ ^{[1
]}

Arnold, DW ^{[1
]}

Reisler, H ^{[1
]}

Wittig, C ^{[1
]}

机构：

[1] Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 326卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(00)00690-4

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：

An HCl molecular beam incident on MgO(100) is photoexcited to v = 2, J = 1 by using a pulsed parametric oscillator. At a translational energy of 0.11 eV, incident HCl is adsorbed. Thermal desorption yields v = 2 molecules whose rotational and translational degrees of freedom are equilibrated at the surface temperature. Surface residence times for v = 2 might be as long as 1 mu s. At 180 K, it is concluded that a large fraction of surface-bound v = 2 molecules reenter the gas phase, while at 120 K, deactivation exceeds desorption by an order of magnitude. Deactivation probably takes place at steps. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：11 / 21

页数：11

共 27 条

[1] CARS STUDIES ON THE HETEROGENOUS RELAXATION OF VIBRATIONALLY EXCITED HYDROGEN AND DEUTERIUM [J].