Production study of Fr, Ra and Ac radioactive ion beams at ISOLDE, CERN

E. Jajčišinová, K. Dockx, M. Au, S. Bara, T. E. Cocolios, K. Chrysalidis, G. J. Farooq-Smith, D. V. Fedorov, V. N. Fedosseev, K. T. Flanagan, M. Heines, D. Houngbo, J. D. Johnson, A. Kellerbauer, S. Kraemer, B. A. Marsh, L. Popescu, J. P. Ramos, S. Rothe, M. D. SeliverstovS. Sels, Simon Stegemann, M. Stryjczyk, V. Verelst

    Research outputpeer-review

    Abstract

    The presented paper discusses the production of radioactive ion beams of francium, radium, and actinium from thick uranium carbide (UCx) targets at ISOLDE, CERN. This study focuses on the release curves and extractable yields of francium, radium and actinium isotopes. The ion source temperature was varied in order to study the relative contributions of surface and laser ionization to the production of the actinium ion beams. The experimental results are presented in the form of release parameters. Representative extractable yields per μC are presented for 222-231Ac, several Ra and Fr isotopes in the mass ranges 214≤A≤233 and 205≤A≤231 respectively. The release efficiency for several isotopes of each of the studied elements was calculated by comparing their yields to the estimated in-target production rates modeled by CERN-FLUKA. The maximal extraction efficiency of actinium was calculated to be 2.1(6)% for a combination of surface ionization using a Ta ion source and resonant laser ionization using the two-step 438.58 nm, and 424.69 nm scheme.

    Original languageEnglish
    Article number11033
    Number of pages9
    JournalScientific Reports
    Volume14
    Issue number1
    DOIs
    StatePublished - Apr 2024

    Funding

    The authors would like to acknowledge all those who participated in the data collection at the IS637 experiment. Furthermore, we would like to thank the ISOLDE Collaboration and technical teams for providing excellent beams and the GSI Target Laboratory for the carbon foils used in the campaign. This work has received funding from the European Commission under Horizon 2020, Marie Sklodowska Curie Actions, ITN contracts No. 642889 (MEDICIS-Promed) and No. 861198 (LISA), Horizon 2020 research and innovation programme contracts No. 654002 (ENSAR2) and No. 101008571 (PRISMAP), ERC Consolidator Grant No. 771036 (MAIDEN) and No. 101088504 (NSHAPE), from the Research Foundations Flanders (FWO, Belgium), from KU Leuven (STG/15/031, C14/22/104), from the Science and Technology Facilities Council grant ST/P004423/1 and from the Academy of Finland grant No. 354968. E.J. acknowledges the support of the Collaborative Doctoral Partnership of the Joint Research Centres of the European Commission No. 35332 between JRC Karlsruhe and KU Leuven. S.B. acknowledges the support of the FWO Fellowship. The authors would like to acknowledge all those who participated in the data collection at the IS637 experiment. Furthermore, we would like to thank the ISOLDE Collaboration and technical teams for providing excellent beams and the GSI Target Laboratory for the carbon foils used in the campaign. This work has received funding from the European Commission under Horizon 2020, Marie Sklodowska Curie Actions, ITN contracts No.\u00A0642889 (MEDICIS-Promed) and No.\u00A0861198 (LISA), Horizon 2020 research and innovation programme contracts No.\u00A0654002 (ENSAR2) and No. 101008571 (PRISMAP), ERC Consolidator Grant No.\u00A0771036 (MAIDEN) and No.\u00A0101088504 (NSHAPE), from the Research Foundations Flanders (FWO, Belgium), from KU Leuven (STG/15/031, C14/22/104), from the Science and Technology Facilities Council grant ST/P004423/1 and from the Academy of Finland grant No.\u00A0354968. E.J. acknowledges the support of the Collaborative Doctoral Partnership of the Joint Research Centres of the European Commission No.\u00A035332 between JRC Karlsruhe and KU Leuven. S.B. acknowledges the support of the FWO Fellowship.

    FundersFunder number
    Horizon Europe
    Fonds Wetenschappelijk Onderzoek
    GSI Helmholtzzentrum für Schwerionenforschung
    CERN - Conseil Européen pour la Recherche Nucléaire 861198
    EUROfusion101008571, 654002, ENSAR2
    STFC - Science and Technology Facilities CouncilST/P004423/1
    KU LeuvenC14/22/104, STG/15/031

      ASJC Scopus subject areas

      • General

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