title: Effect of a triplet to singlet state interaction on photofragmentation dynamics: highly excited states of HBr probed by VMI and REMPI as a case study.
abstract: Analysis of mass resolved spectra as well as velocity map images derived from resonance enhanced multiphoton ionization (REMPI) of HBr via resonance excitations to mixed Rydberg (6pπ3Σ-(v' = 0)) and valence (ion-pair) (V1Σ+(v' = m + 17)) states allows characterization of the effect of a triplet-to-singlet state interaction on further photoexcitation and photoionization processes. The analysis makes use of rotational spectra line shifts, line intensity alterations, kinetic energy release spectra as well as angular distributions. Energy-level-dependent state mixing of the resonance excited states is quantified and photoexcitation processes, leading to H+formation, are characterized in terms of the states and fragmentation processes involved, depending on the state mixing.
authors.affiliation: Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Vassilika Vouton, 71110 Heraklion, Greece.
authors.forename: Pavle
authors.initials: P
authors.lastname: Glodic
authors.affiliation: Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Vassilika Vouton, 71110 Heraklion, Greece.
authors.forename: Dimitris
authors.initials: D
authors.lastname: Zaouris
authors.affiliation: Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Vassilika Vouton, 71110 Heraklion, Greece.
authors.forename: Peter C
authors.identifier: http://orcid.org/0000-0001-8873-2326
authors.initials: PC
authors.lastname: Samartzis
authors.affiliation: Science Institute, University of Iceland, Dunhagi 3, 107 Reykjavík, Iceland. agust@hi.is.
authors.forename: Arnar
authors.initials: A
authors.lastname: Hafliðason
authors.affiliation: Science Institute, University of Iceland, Dunhagi 3, 107 Reykjavík, Iceland. agust@hi.is.
authors.forename: Ágúst
authors.initials: Á
authors.lastname: Kvaran