title: Probing adsorbate state lifetime with low energy ions.
abstract: Charge transfer during back scattering of a H- ion from a Cu(111) metal surface with Cs adsorbates is studied theoretically within a wave packet propagation approach. We show that the long lifetime of the Cs-localized state in the Cs/Cu(111) system deeply modifies the nature of projectile-surface charge transfer, suppressing its irreversible character. Back and forth electron transfer between the projectile and the adsorbate during the collision results in characteristic oscillations in the H- yield as a function of projectile energy.
authors.affiliation: Laboratoire des Collisions Atomiques et Moléculaires, UMR CNRS-Université Paris-Sud 8625, Bâtiment 351, Université Paris-Sud, 91405 Orsay Cedex, France.
authors.forename: J
authors.initials: J
authors.lastname: Sjakste
authors.forename: A G
authors.initials: AG
authors.lastname: Borisov
authors.forename: J P
authors.initials: JP
authors.lastname: Gauyacq