Bochum 1998 – wissenschaftliches Programm
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HK: Hadronen und Kerne
HK 3: Instrumentation I, Ion Sources, Targets
HK 3.1: Gruppenbericht
Montag, 16. März 1998, 14:00–14:30, A
Recent developments of the ISOLDE laser ion source — •Ulli Köster1,2, Richard Catherall3, Valentin Fedoseyev4, Gerrit-Jan Focker3, Gerhard Huber5, Ove Jonsson3, Mitsuo Koizumi6, Erich Kugler3, Jacques Lettry3, Viatcheslav Mishin4, Helge Ravn3, Volker Sebastian5, Claire Tamburella3, and the ISOLDE Collaboration3 — 1Technische Universität München, D-85748 Garching — 2Institut Laue Langevin, F-38042 Grenoble — 3CERN, CH-1211 Genève 23 — 4Institute of Spectroscopy, Russian Academy of Sciences, RUS-142092 Troitsk — 5Universität Mainz, Institut für Physik, D-55099 Mainz — 6Japan Atomic Energy Research Institute, Takasaki, 370-12 Japan
During the last year the laser ion source (LIS), in which stepwise resonant laser ionization is performed inside a high temperature cavity, became the most used ion source at the on-line isotope separator ISOLDE. It has been extended to four new elements [1]: Be, Zn, Cu and Cd.
The first resonant transition of the elements Be, Zn and Cd (ionization potentials > 9 eV) is in the far ultraviolet region. The intense UV beam was achieved in a new laser setup via frequency tripling.
All particle stable beryllium isotopes from 7Be to 14Be were separated and their isotope shift was observed.
The high chemical selectivity of the LIS allowed also to gain a wealth of new spectroscopic information (10 new halflives, …) in on-line runs with the elements Mn, Zn and Ag. For the first time high- and low-spin isomers of silver were separated selectively using the hyperfine splitting.
Thanks for support by the ’Beschleunigerlaboratorium der
TU und LMU München’.
[1] J. Lettry et al., Proc. of ICIS’97, to be published in Rev. Sci. Instr.