Mainz 2017 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 3: Resonance Ionization MS and others
MS 3.4: Vortrag
Dienstag, 7. März 2017, 12:15–12:30, RW 2
Towards High-resolution In-source Laser Spectroscopy On-line: A Perpendicular Laser - Atom Beam Upgrade for the Laser Ion Source and Trap (LIST) at CERN/ISOLDE — •Reinhard Heinke1, Valentin Fedosseev2, Tom Kieck1, Tobias Kron1, Bruce Marsh2, Sebastian Raeder3, Sebastian Rothe2, Marcel Trümper1, Carsten Weichhold1, and Klaus Wendt1 — 1Johannes Gutenberg-Universität, Mainz — 2EN-STI Department, CERN — 3Helmholtz-Institut Mainz
Highly selective and efficient laser ion sources are of fundamental importance to study atomic and nuclear properties along the nuclear chart. Upgrading the well-established, highly element-selective laser resonance ionization technique with additional suppression of isobaric contaminations immediately at the exit of the hot ion source cavity led to the development of the Laser Ion Source and Trap LIST, operated at the radioactive ion beam facility ISOLDE at CERN.
For high precision spectroscopic studies and isomer-selective ionization, a crossed atom - laser beam interaction geometry based on robust metal mirrors near the ionization region has been integrated into the LIST, reducing the experimentally realized spectral linewidth due to Doppler broadening in the atom vapor from a few GHz down to below 100 MHz. In the framework of the ECHo project, hyperfine structure studies on the radioactive isotopes 163, 166mHo were performed at the RISIKO off-line mass separator at Mainz University, showing opportunities and constraints of a future implementation of this novel PI-LIST (Perpendicularly Illuminated) design at on-line facilities.