EXPERIMENTAL-EVIDENCE OF ENHANCED DIFFUSE MONOMER SCATTTERING IN CLUSTER-SURFACE COLLISIONS - AR-N ON GRAPHITE

被引：33

作者：

BENSLIMANE, M

CHATELET, M

DEMARTINO, A

PRADERE, F

VACH, H

机构：

[1] Laboratoire d'Optique Quantique, C.N.R.S., Ecole Polytechnique

来源：

CHEMICAL PHYSICS LETTERS | 1995年 / 237卷 / 3-4期

关键词：

D O I：

10.1016/0009-2614(95)00317-W

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 report the first experimental observation of diffuse scattering of monomers exhibiting significant velocity thermalization in large argon clusters collisions with a pyrolytic surface. Angular distributions of the outcoming argon atoms show a diffuse component for which time-of-flight spectra are independent of incidence angle and incoming cluster size, while they vary significantly with surface temperature. The amplitude of the diffuse scattering component is enhanced by up to a factor of three for incident clusters over its value for incident monomers. This enhancement is discussed by using a simple model of atom trapping-desorption on flat surfaces.

引用

页码：323 / 328

页数：6

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