H2S ultrafast dissociation probed by energy-selected resonant Auger electron-ion coincidence measurements.
We have studied the ultrafast dissociation of the H2S molecule upon S 2p3/2-->6a1 inner-shell excitation by combining high-resolution resonant Auger spectroscopy and energy-selected Auger electron-ion coincidence measurements. Auger final states have been correlated to the different fragmentation pathways (S+, HS+, and H2S+ ions). As an original result, we evidence a three-step mechanism to describe the resonant production of S+: the Auger recombination in the HS* fragment is followed for the A 3Pi and c 1Pi states by the S++H fragmentation mechanism.
Le Guen
K
K
Laboratoire de Chimie Physique-Matière et Rayonnement (LCPMR), UMR 7614, Université Pierre et Marie Curie-Paris 6, 11 Rue Pierre et Marie Curie, F-75231 Paris Cedex 05, France. klg@ccr.jussieu.fr
Miron
C
C
Céolin
D
D
Guillemin
R
R
Leclercq
N
N
Simon
M
M
Morin
P
P
Mocellin
A
A
Björneholm
O
O
Naves de Brito
A
A
Sorensen
S L
SL