title: Influence of formation path on the CH2BrCl2+ dissociation dynamics.
abstract: 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.
authors.affiliation: 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
authors.forename: K
authors.initials: K
authors.lastname: Le Guen
authors.forename: M
authors.initials: M
authors.lastname: Ahmad
authors.forename: D
authors.initials: D
authors.lastname: Céolin
authors.forename: P
authors.initials: P
authors.lastname: Lablanquie
authors.forename: C
authors.initials: C
authors.lastname: Miron
authors.forename: F
authors.initials: F
authors.lastname: Penent
authors.forename: P
authors.initials: P
authors.lastname: Morin
authors.forename: M
authors.initials: M
authors.lastname: Simon