title: Use of a Continuous Wave Laser and Pockels Cell for Sensitive High-Resolution Collinear Resonance Ionization Spectroscopy.
abstract: New technical developments have led to a 2 orders of magnitude improvement of the resolution of the collinear resonance ionization spectroscopy (CRIS) experiment at ISOLDE, CERN, without sacrificing the high efficiency of the CRIS technique. Experimental linewidths of 20(1) MHz were obtained on radioactive beams of francium, allowing us for the first time to determine the electric quadrupole moment of the short lived [t_{1/2}=22.0(5) ms] ^{219}Fr Q_{s}=-1.21(2) eb, which would not have been possible without the advantages offered by the new method. This method relies on a continuous-wave laser and an external Pockels cell to produce narrow-band light pulses, required to reach the high resolution in two-step resonance ionization. Exotic nuclei produced at rates of a few hundred ions/s can now be studied with high resolution, allowing detailed studies of the anchor points for nuclear theories.
authors.affiliation: KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium.
authors.forename: R P
authors.initials: RP
authors.lastname: de Groote
authors.affiliation: KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium.
authors.forename: I
authors.initials: I
authors.lastname: Budinčević
authors.affiliation: School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom.
authors.forename: J
authors.initials: J
authors.lastname: Billowes
authors.affiliation: KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium.|School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom.
authors.forename: M L
authors.initials: ML
authors.lastname: Bissell
authors.affiliation: School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom.
authors.forename: T E
authors.initials: TE
authors.lastname: Cocolios
authors.affiliation: School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom.
authors.forename: G J
authors.initials: GJ
authors.lastname: Farooq-Smith
authors.affiliation: Engineering Department, CERN, CH-1211 Geneva 23, Switzerland.
authors.forename: V N
authors.initials: VN
authors.lastname: Fedosseev
authors.affiliation: School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom.
authors.forename: K T
authors.initials: KT
authors.lastname: Flanagan
authors.affiliation: Institut de Physique Nucléaire d'Orsay, F-91406 Orsay, France.
authors.forename: S
authors.initials: S
authors.lastname: Franchoo
authors.affiliation: KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium.
authors.forename: R F
authors.initials: RF
authors.lastname: Garcia Ruiz
authors.affiliation: KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium.
authors.forename: H
authors.initials: H
authors.lastname: Heylen
authors.affiliation: Institut de Physique Nucléaire d'Orsay, F-91406 Orsay, France.
authors.forename: R
authors.initials: R
authors.lastname: Li
authors.affiliation: KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium.|School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom.|Physics Department, CERN, CH-1211 Geneva 23, Switzerland.
authors.forename: K M
authors.initials: KM
authors.lastname: Lynch
authors.affiliation: Engineering Department, CERN, CH-1211 Geneva 23, Switzerland.
authors.forename: B A
authors.initials: BA
authors.lastname: Marsh
authors.affiliation: KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium.
authors.forename: G
authors.initials: G
authors.lastname: Neyens
authors.affiliation: Engineering Department, CERN, CH-1211 Geneva 23, Switzerland.|Institut für Physik, Johannes Gutenberg-Universität, D-55128 Mainz, Germany.
authors.forename: R E
authors.initials: RE
authors.lastname: Rossel
authors.affiliation: Engineering Department, CERN, CH-1211 Geneva 23, Switzerland.
authors.forename: S
authors.initials: S
authors.lastname: Rothe
authors.affiliation: Department of Physics, New York University, New York, New York 10003, USA.
authors.forename: H H
authors.initials: HH
authors.lastname: Stroke
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität, D-55128 Mainz, Germany.
authors.forename: K D A
authors.initials: KD
authors.lastname: Wendt
authors.affiliation: School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom.
authors.forename: S G
authors.initials: SG
authors.lastname: Wilkins
authors.affiliation: KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium.
authors.forename: X
authors.initials: X
authors.lastname: Yang