Role of morphology of D2O ice (20-160 K) in low energy electron stimulated desorption of D- and O- anions, and x-ray photon stimulated desorption of D+ cations

被引：9

作者：

Tronc, M

Azria, R

机构：

[1] Univ Paris 06, Lab Chim Phys Mat & Rayonnement, F-75231 Paris 05, France

[2] CNRS UMR 7614, F-75231 Paris 05, France

[3] Univ Paris 11, Collis Atom & Mol Lab, F-91405 Orsay, France

[4] CNRS UMR 8625, F-91405 Orsay, France

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | 2001年 / 205卷 / 1-3期

关键词：

desorption; (ESD; PSD); morphology; ice;

D O I：

10.1016/S1387-3806(00)00269-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The low energy electron stimulated desorption yield of D- anions in pure multilayer D2O films, and of O- in submonolayer O-2 covered D2O films is strongly dependent on the D2O condensation temperature (20-160 K) on Pt. Likewise the desorption of D+ cations induced by oxygen Is excitation to the ground state empty levels of D2O depends on ice condensation temperature. These observations are connected with the morphology of ice films which are microporous and amorphous at T < 90 K and crystalline at T > 150 K. Moreover both the change of morphology and related adsorption capacity of ice films with condensation temperature are observed in situ with x-ray absorption spectroscopy. (Int J Mass Spectrom 205 (2001) 325-330) (C) 2001 Elsevier Science B.V.

引用

收藏

页码：325 / 330

页数：6

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