title: Influence of higher-order dispersion coefficients on near-threshold bound and continuum states: application to 88Sr2.
abstract: We give a simple description of quantum states near the dissociation threshold of deep interatomic potentials. The influence of the potential tail is separated from effects due to the interaction at short distances. We present a general formalism which is valid for weakly bound and low-energy continuum states, both for vanishing and non-vanishing angular momentum. Its applicability is demonstrated for the example of the electronic ground state of the strontium dimer (88)Sr(2). With an appropriate choice of the potential tail that includes higher-order dispersion coefficients, all short-range effects are incorporated via the threshold quantum number ν(D) and one further parameter accounting for residual short-range effects.
authors.affiliation: Technische Universität München, D-85747 Garching, Germany. alexander-kaiser@gmx.at
authors.forename: Alexander
authors.initials: A
authors.lastname: Kaiser
authors.forename: Tim-Oliver
authors.initials: TO
authors.lastname: Müller
authors.forename: Harald
authors.initials: H
authors.lastname: Friedrich