Evidence for ultra-fast dissociation of molecular water from resonant Auger spectroscopy
I Hjelte, MN Piancastelli, RF Fink, O Björneholm… - Chemical physics …, 2001 - Elsevier
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, ie 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 …
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, ie 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 …
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