Erlangen 2022 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 6: New Developments
MS 6.5: Talk
Wednesday, March 16, 2022, 15:15–15:30, MS-H9
Efficiency measurements of in-gas-jet resonance ionization spectroscopy — •Julian Auler1, Michael Block1,2,3, Premaditya Chhetri4, Arno Claessens4, Rafael Ferrer4, Magdalena Kaja1, Tom Kieck3, Nina Kneip1, Jeremy Lantis1,2, Vladimir Manea5,6, Danny Münzberg1,2,3, Steven Nothhelfer1,2,3, Sebastian Raeder2,3, Jekabs Romans4, Simon Sels4, Matou Stemmler1, Dominik Studer1, Piet Van Duppen4, Jessica Warbinek1,3, Felix Weber1, and Klaus Wendt1 — 1Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany — 2Helmholtz Institute Mainz, 55099 Mainz, Germany — 3GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany — 4KU Leuven, Institutuut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium — 5Laboratoire de Physique des 2 Infinis Irène Joliot Curie, 91400 Orsay, France — 6Grand Accélérateur National d’Ions Lourds, 14000 Caen, France
We present a new gas-jet experiment intended to study optical transitions of the heaviest elements at the Separator for Heavy Ion reaction Products (SHIP) at GSI, Darmstadt. The novel aspect of the gas-jet experiment is the extraction of previously stopped and neutralized heavy ions in a well-defined, low-temperature, homogeneous, hypersonic gas-jet. Laser resonance ionization spectroscopy is performed in the gas jet, yielding high spectral resolution due to reduced Doppler broadening. Considering the limited production rate of heavy ions at on-line facilities, such as GSI, a high total efficiency is a crucial requirement for the gas-jet experiment. The overall efficiency can be factorized into different contributions, like the injection of heavy ions into the setup, the ion transport efficiency, the re-evaporation efficiency, the efficiency of resonance ionisation and the detector efficiency. Additionally, for radioactive elements the losses due to decay have to be taken into account. Efficiency measurements are performed with both stable and radioactive samples. The results of the efficiency measurements will be presented.