title: Dissociative Photoionization of He···Li2: A Theoretical Study.
abstract: Dissociative photoionization of the He···Li2 van der Waals complex to the ground electronic state of the He···Li2+ ion is investigated theoretically. The photoionization cross section is computed using existing interaction potentials. Resonances are found on top of a structured continuum. They are assigned to vibrational predissociation of the ion by comparison with Fermi Golden Rule calculations. Because of the differences in potential energy surfaces between the neutral and ionic complexes, only the resonances corresponding to quasibound states with the highest excitation in the van der Waals modes are visible. The other quasi bound states obtained in the Fermi Golden Rule calculations can give information on vibrational energy relaxation rates in other collisional processes involving the lithium dimer ion and a helium atom.
authors.affiliation: LCAR-IRSAMC, Université Toulouse 3 - Paul Sabatier and CNRS , 31062 Toulouse, France.|Laboratoire des Interfaces et Matériaux Avancés, Département de Physique, Faculté des Sciences, Université de Monastir , Avenue de l'Environnement, 5019 Monastir, Tunisia.
authors.forename: Samah
authors.initials: S
authors.lastname: Saidi
authors.affiliation: Laboratoire des Interfaces et Matériaux Avancés, Département de Physique, Faculté des Sciences, Université de Monastir , Avenue de l'Environnement, 5019 Monastir, Tunisia.|Department of Mathematics and Natural Sciences, School of Arts and Sciences, American University of Ras Al Khaimah , Ras Al Khaimah, UAE.
authors.forename: Hamid
authors.initials: H
authors.lastname: Berriche
authors.affiliation: LCAR-IRSAMC, Université Toulouse 3 - Paul Sabatier and CNRS , 31062 Toulouse, France.
authors.forename: Nadine
authors.initials: N
authors.lastname: Halberstadt