title: Single ion dynamics in molten sodium bromide.
abstract: We present a study on the single ion dynamics in the molten alkali halide NaBr. Quasielastic neutron scattering was employed to extract the self-diffusion coefficient of the sodium ions at three temperatures. Molecular dynamics simulations using rigid and polarizable ion models have been performed in parallel to extract the sodium and bromide single dynamics and ionic conductivities. Two methods have been employed to derive the ion diffusion, calculating the mean squared displacements and the velocity autocorrelation functions, as well as analysing the increase of the line widths of the self-dynamic structure factors. The sodium diffusion coefficients show a remarkable good agreement between experiment and simulation utilising the polarisable potential.
authors.affiliation: Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain.
authors.forename: O
authors.initials: O
authors.lastname: Alcaraz
authors.affiliation: ISIS Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom.
authors.forename: F
authors.initials: F
authors.lastname: Demmel
authors.affiliation: Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Trullas