https://doi.org/10.1140/epja/i2019-12873-4
Regular Article - Experimental Physics
Developments towards the delivery of selenium ion beams at ISOLDE
1
CERN, 1211, Geneva, Switzerland
2
Institut für Physik, Johannes Gutenberg-Universität, 55099, Mainz, Germany
3
Institiut für Kernchemie, Johannes Gutenberg-Universität, 55099, Mainz, Germany
4
Helmholtz-Institut Mainz, 55099, Mainz, Germany
5
GSI Helmholtzzentrum für Schwerionenforschung, 64291, Darmstadt, Germany
6
KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001, Leuven, Belgium
* e-mail: katerina.chrysalidis@cern.ch
Received:
24
April
2019
Accepted:
1
September
2019
Published online:
14
October
2019
The production of selenium ion beams has been investigated at the CERN-ISOLDE facility via two different ionization methods. Whilst molecular selenium (SeCO) beams were produced at ISOLDE since the early 1990s, recent attempts at reliably reproducing these results have so far been unsuccessful. Here we report on tests of a step-wise resonance laser ionization scheme for atomic selenium using the ISOLDE Resonance Ionization Laser Ion Source (RILIS). For stable selenium an ionization efficiency of 1% was achieved. During the first on-line radioisotope production tests, a yield of 
ions/μC was measured for 71Se+, using a ZrO2 target with an electron impact ion source. In parallel, an approach for extraction of molecular carbonyl selenide (SeCO) beams was tested. The same ion source and target material were used and a maximum yield of 
ions/μ C of 71SeCO+ was measured.
© CERN, 2019
