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.
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页码：323 / 328
页数：6
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