title: High-resolution vacuum-ultraviolet spectroscopy of an electron-cooled D- beam.
abstract: The shape parameters for the lowest-lying (1)P(o) resonance, (2)¿0¿-3, of D- have been measured using high-resolution vacuum-ultraviolet spectroscopy. The experiment was performed at the storage ring ASTRID, and the resonance was resolved by applying electron cooling to reduce the velocity spread of the ion beam. The resonance has a width of 37(3) microeV while the asymmetry parameter q of the Fano profile is -16(3). These values present the first critical test of a large number of theoretical calculations.
authors.affiliation: Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark.
authors.forename: M K
authors.initials: MK
authors.lastname: Raarup
authors.forename: U V
authors.initials: UV
authors.lastname: Pedersen
authors.forename: V V
authors.initials: VV
authors.lastname: Petrunin
authors.forename: P
authors.initials: P
authors.lastname: Balling
authors.forename: T
authors.initials: T
authors.lastname: Andersen