Evidence for ultra-fast dissociation of molecular water from resonant Auger spectroscopy

被引：116

作者：

Hjelte, I

Piancastelli, MN

Fink, RF

Björneholm, O

Bässler, M

Feifel, R

Giertz, A

Wang, H

Wiesner, K

Ausmees, A

Miron, C

Sorensen, SL

Svensson, S

机构：

[1] Uppsala Univ, Dept Phys, S-75121 Uppsala, Sweden

[2] Univ Roma Tor Vergata, Dept Chem Sci & Technol, I-00133 Rome, Italy

[3] Chem Ctr Lund, Dept Theoret Chem, S-22100 Lund, Sweden

[4] Univ Tartu, Inst Phys, EE-50090 Tartu, Estonia

[5] Lund Univ, Inst Phys, Dept Synchrotron Radiat Res, S-22100 Lund, Sweden

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 334卷 / 1-3期

关键词：

D O I：

10.1016/S0009-2614(00)01434-2

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 present direct evidence for ultra-fast dissociation of molecular water in connection photo-excitation of the Ols --> 4a(1) resonance. The core-excited H2O molecules are shown to dissociate into core-excited O*H and neutral H on a time scale comparable to the core hole lifetime, i,e. a few femtoseconds. This conclusion is based on a resonant Auger study, qualitative arguments and ab initio calculations. 'Hot bands' connected to Anger transitions from vibrationally excited OH fragments are identified, and these exhibit a dynamical behavior which qualitatively follows the change in excess energy. (C) 2001 Elsevier Science B,V. All rights reserved.

引用

页码：151 / 158

页数：8

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