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

Hjelte, I. ; Piancastelli, M. N. ; Fink, R. F. ; Björneholm, O. LU ; Bässler, M. LU ; Feifel, R. ; Giertz, A. LU ; Wang, H. LU ; Wiesner, K. and Ausmees, A. , et al. (2001) In Chemical Physics Letters 334(1-3). p.151-158
Abstract

We present direct evidence for ultra-fast dissociation of molecular water in connection photo-excitation of the O1s→4a1 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 Auger transitions from vibrationally excited OH fragments are identified, and these exhibit a dynamical behavior which qualitatively follows the change in excess energy.

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organization
publishing date
type
Contribution to journal
publication status
published
in
Chemical Physics Letters
volume
334
issue
1-3
pages
8 pages
publisher
Elsevier
external identifiers
  • scopus:0000194802
ISSN
0009-2614
DOI
10.1016/S0009-2614(00)01434-2
language
English
LU publication?
yes
id
e5f8bdff-e3cf-485c-9661-004dac286279
date added to LUP
2020-10-29 18:30:07
date last changed
2021-04-20 04:25:49
@article{e5f8bdff-e3cf-485c-9661-004dac286279,
  abstract     = {<p>We present direct evidence for ultra-fast dissociation of molecular water in connection photo-excitation of the O1s→4a<sub>1</sub> resonance. The core-excited H<sub>2</sub>O molecules are shown to dissociate into core-excited O<sup>*</sup>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 Auger transitions from vibrationally excited OH fragments are identified, and these exhibit a dynamical behavior which qualitatively follows the change in excess energy.</p>},
  author       = {Hjelte, I. and Piancastelli, M. N. and Fink, R. F. and Björneholm, O. and Bässler, M. and Feifel, R. and Giertz, A. and Wang, H. and Wiesner, K. and Ausmees, A. and Miron, C. and Sorensen, S. L. and Svensson, S.},
  issn         = {0009-2614},
  language     = {eng},
  month        = {02},
  number       = {1-3},
  pages        = {151--158},
  publisher    = {Elsevier},
  series       = {Chemical Physics Letters},
  title        = {Evidence for ultra-fast dissociation of molecular water from resonant Auger spectroscopy},
  url          = {http://dx.doi.org/10.1016/S0009-2614(00)01434-2},
  doi          = {10.1016/S0009-2614(00)01434-2},
  volume       = {334},
  year         = {2001},
}