Heidelberg 2015 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 5: Resonance Ionization

MS 5.1: Hauptvortrag

Dienstag, 24. März 2015, 14:30–15:00, PH/HS2

Resonance laser ionization for RIB production and spectroscopy in gas cells and jets — •Iain Moore — University of Jyväskylä, Jyväskylä, Finland

In recent years, resonant laser ionization has become a mature technique, playing a key role in the selective production of radioactive nuclides at on-line isotope separator (ISOL) and ion guide isotope separator (IGISOL) facilities. A further increase in selectivity has been successfully demonstrated whereby laser ionization is performed immediately downstream from the ion source. In connection with gas cell-based approaches, neutral radioactive atoms are selectively ionized upon exit from the cell within the expanding gas jet. By combining gas jet laser ionization with a mass separator, ultra-high purification of low-energy beams becomes a reality.

More recently, laser spectroscopy has been performed in-source to obtain fundamental and model-independent data on the structure of ground and isomeric nuclear states. In order to increase the sensitivity of such methods, the gas jet offers an attractive environment with reduced temperature and density. High power, high repetition rate laser systems with narrow bandwidths can exploit the unique opportunities offered by the gas jet.

This contribution will review the progress at existing facilities as well as presenting an outlook for the future.