Infrared laser-induced desorption of N2O condensed on NaCl(100)

被引:13
作者
Redlich, B
Zacharias, H
Meijer, G
von Helden, G
机构
[1] FOM, Inst Plasma Phys Rijnhuizen, NL-3430 BE Nieuwegein, Netherlands
[2] Univ Munster, Inst Phys, D-48149 Munster, Germany
[3] Univ Nijmegen, Dept Mol & Laser Phys, NL-6525 ED Nijmegen, Netherlands
关键词
photon stimulated desorption (non-electronic); desorption induced by photon stimulation; vibrations of adsorbed molecules; alkali halides; nitrogen oxides; single crystal surfaces; insulating surfaces;
D O I
10.1016/S0039-6028(01)01971-9
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
A study of infrared laser-induced desorption of N2O condensed on NaCl(1 0 0) is presented. The comparison of the wavelength dependent desorption yield to the linear absorption spectrum shows that desorption of intact molecules occurs at the resonance frequencies of the symmetric stretching and the bending vibration of N2O. The analysis of the time-of-flight spectra yields translational temperatures that are well above the substrate temperature and depend strongly on the applied laser fluence. In addition, the dependence of the desorption signal on layer thickness and substrate temperature is investigated. The results are discussed in the context of different desorption mechanisms, and it is concluded that a resonant heating process can best explain the experimental observations. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:325 / 330
页数:6
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