Influence of formation path on the CH2BrCl2+ dissociation dynamics.
To get further insight into the CH2BrCl site-selective fragmentation previously observed upon inner-shell ionization, we have performed high-resolution Br 3d and Cl 2p Auger and spin-orbit resolved Br 3d Auger spectra, and studied the dissociation properties of the CH2BrCl2+ dication formed at threshold by means of threshold electron pair-ion coincidence measurements. The key point is that the origin of site-specific bond breaking is found in the Auger decay itself, as it preferentially populates selected dication states. Whereas the predominance of the C-Br bond breaking is observed in both threshold and inner-shell studies, no signature of selective C-Cl rupture is reported for the dication formed at threshold.
Le Guen
K
K
Laboratoire de Chimie-Physique, Matière et Rayonnement (LCPMR), UMR 7614, Université P. et M. Curie, 11 rue P. et M. Curie, F-75231 Paris cedex 05, France. klg@ccr.jussieu.fr
Ahmad
M
M
Céolin
D
D
Lablanquie
P
P
Miron
C
C
Penent
F
F
Morin
P
P
Simon
M
M