title: Electronic state-lifetime interference in resonant Auger spectra: a tool to disentangle overlapping core-excited states.
abstract: We have measured resonant-Auger decay following Cl 1s(-1) excitations in HCl and CH3Cl molecules, and extracted the pseudo-cross sections of different Cl 2p(-2) final states. These cross sections show clear evidence of shake processes as well as contributions of electronic state-lifetime interference (ELI). To describe the spectra we developed a fit approach that takes into account ELI contributions and ultrafast nuclear dynamics in dissociative core-excited states. Using this approach we utilized the ELI contributions to obtain the intensity ratios of the overlapping states Cl 1s(-1)4pπ/1s(-1)4pσ in HCl and Cl 1s(-1)4pe/1s(-1)4pa1 in CH3Cl. The experimental value for HCl is compared with theoretical results showing satisfactory agreement.
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005, Paris, France. gildas.goldsztejn@upmc.fr.
authors.forename: Gildas
authors.initials: G
authors.lastname: Goldsztejn
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005, Paris, France. gildas.goldsztejn@upmc.fr and Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France.
authors.forename: Tatiana
authors.initials: T
authors.lastname: Marchenko
authors.affiliation: Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France.
authors.forename: Denis
authors.initials: D
authors.lastname: Céolin
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005, Paris, France. gildas.goldsztejn@upmc.fr and Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France.
authors.forename: Loïc
authors.initials: L
authors.lastname: Journel
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005, Paris, France. gildas.goldsztejn@upmc.fr and Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France.
authors.forename: Renaud
authors.initials: R
authors.lastname: Guillemin
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005, Paris, France. gildas.goldsztejn@upmc.fr and Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France.
authors.forename: Jean-Pascal
authors.initials: JP
authors.lastname: Rueff
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005, Paris, France. gildas.goldsztejn@upmc.fr.
authors.forename: Rajesh K
authors.initials: RK
authors.lastname: Kushawaha
authors.affiliation: Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany.
authors.forename: Ralph
authors.initials: R
authors.lastname: Püttner
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005, Paris, France. gildas.goldsztejn@upmc.fr and Department of Physics and Astronomy, Uppsala University, P. O. Box 516, SE-751 20 Uppsala, Sweden.
authors.forename: Maria Novella
authors.initials: MN
authors.lastname: Piancastelli
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005, Paris, France. gildas.goldsztejn@upmc.fr and Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Simon