Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 297, Issue -, Pages 7-22Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2012.12.008
Keywords
Resonance ionization spectroscopy; Laser ion source; Gas jet; de Laval nozzle; Spike nozzle
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Funding
- FWO-Vlaanderen (Belgium)
- BOF KU Leuven [GOA/2010/010]
- IAP Belgian Science Policy (BriX network) [P6/23]
- European Commission [RII3-CT-2010-262010]
- European Research Council [ERC-2011-AdG-291561-HELIOS]
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New approaches to perform efficient and selective step-wise resonance ionization spectroscopy (RIS) of radioactive atoms in different types of supersonic gas jets are proposed. This novel application results in a major expansion of the in-gas laser ionization and spectroscopy (IGLIS) method developed at KU Leuven. Implementation of resonance ionization in the supersonic gas jet allows to increase the spectral resolution by one order of magnitude in comparison with the currently performed in-gas-cell ionization spectroscopy. Properties of supersonic beams, obtained from the de Laval-, the spike-, and the free jet nozzles that are important for the reduction of the spectral line broadening mechanisms in cold and low density environments are discussed. Requirements for the laser radiation and for the vacuum pumping system are also examined. Finally, first results of high-resolution spectroscopy in the supersonic free jet are presented for the 327.4 nm 3d(10)4s S-2(1/2) -> 3d(10)4p P-2(1/2) transition in the stable Cu-63 isotope using an amplified single mode laser radiation. (c) 2012 Elsevier B.V. All rights reserved.
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