Photodissociation of condensed carbon dioxide below the gas phase thresholds

被引：2
|
作者：
Coquel, JM [1 ]
Siller, L
Wilkes, J
Carrapa, R
Lamont, CLA
Gasche, TA
Palmer, RE
Moutinho, AMC
机构：
[1] Univ Birmingham, Sch Phys & Astron, Nanoscale Phys Res Lab, Birmingham B15 2TT, W Midlands, England
[2] Univ Huddersfield, Dept Chem & Biol Sci, Huddersfield HD1 3DH, W Yorkshire, England
[3] Estrada Nacl 10, Inst Tecnol & Nucl, Dept Quim, P-2686 Sacavem, Portugal
[4] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Fis, GIDS, P-2825 Monte De Caparica, Portugal
来源：
CHEMICAL PHYSICS LETTERS | 1998年 / 287卷 / 5-6期
关键词：
D O I：
10.1016/S0009-2614(98)00219-X
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 have investigated photodesorption from condensed carbon dioxide for photon energies ranging from 13 to 35 eV using synchrotron radiation. We report the desorption of O-2(+) ions at energies as low as 13 eV, and discuss this behaviour in terms of ion-molecule reactions. The desorbed CO+ ion yield shows resonances at similar to 15.4 and similar to 17 eV, below the gas-phase thermodynamic threshold for CO+ formation. These peaks are also assigned to a two-step process, in which the photodissociation of CO2 leads to neutral CO production. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：742 / 746
页数：5
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