Developments towards the delivery of selenium ion beams at ISOLDE
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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 \( \approx 2.4 \times 10^4\) 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 \( \approx 3.6\times 10^5\) ions/μ C of 71SeCO+ was measured.
- 3.U. Köster, in Exotic Nuclei and Atomic Masses (ENAM 98) (ASCE, 1998) pp. 989--994Google Scholar
- 10.D. Doherty, J. Ljungvall, Technical report CERN-INTC-2014-057. INTC-P-423 (2014)Google Scholar
- 11.N. Orce, Technical Report CERN-INTC-2012-067. INTC-P-368 (2012)Google Scholar
- 17.NIST database, extracted January (2017)Google Scholar
- 23.B. Marsh, Contribution to the CAS-CERN Accelerator School: Ion Sources, Senec, Slovakia, 29 May - 8 June 2012, https://cds.cern.ch/record/1445287 (CERN, 2013)
- 26.T.G. Pearson, P.L. Robinson, J. Chem. Soc. (Resumed), pp. 652--660 (1932)Google Scholar
- 27.L. Penescu, Techniques to produce and accelerate radioactive ion beams, PhD Thesis, Bucharest, Polytechnic Inst (2009)Google Scholar
- 30.A. Roine, HSC Chemistry 7.1. http://www.hsc-chemistry.net (2010) (online
- 32.J.P. Ramos, Nucl. Instrum. Methods B, https://doi.org/10.1016/j.nimb.2019.05.045
- 33.A. Kelic, arXiv:0906.4193 (2009)Google Scholar
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