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Half-life determination of heavy ions in a storage ring considering feeding and depleting background processes

Journal Article · · European Physical Journal. A, Hadrons and Nuclei (Online)
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  1. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Chinese Academy of Sciences (CAS), Lanzhou (China). Key Laboratory of High Precision Nuclear Spectroscopy; Max Planck Inst. fuer Kernphysik, Heidelberg (Germany)
  2. TRIUMF, Vancouver, BC (Canada); Univ. of British Columbia, Vancouver, BC (Canada)
  3. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Univ. of Edinburgh, Scotland (United Kingdom); Univ. of Surrey, Guildford (United Kingdom)
  4. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  5. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Univ. zu Koln (Germany)
  6. Istanbul Univ. (Turkey)
  7. Max Planck Inst. fuer Kernphysik, Heidelberg (Germany)
  8. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Justus-Liebig Univ., Giessen (Germany)
  9. TRIUMF, Vancouver, BC (Canada)
  10. Technische Univ. München, Garching (Germany)
  11. Chinese Academy of Sciences (CAS), Lanzhou (China). Key Laboratory of High Precision Nuclear Spectroscopy
  12. CEA, IRFU, Gif-sur-Yvette (France); Univ. Paris-Saclay, Gif-sur-Yvette (France)
  13. J.W. Goethe Univ., Frankfurt (Germany)
  14. Justus-Liebig Univ., Giessen (Germany); GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  15. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Helmholtz Institute Jena (Germany); Friedrich Schiller Univ., Jena (Germany)
  16. Inst. of Physical and Chemical Research (RIKEN), Wako (Japan). High Energy Nuclear Physics Laboratory
  17. Centre National de la Recherche Scientifique (CNRS), Paris (France). Institut des NanoSciences de Paris (INSP); Sorbonne Univ., Paris (France)
  18. Univ. of Edinburgh, Scotland (United Kingdom)
  19. Saitama Univ. (Japan)
+ Show Author Affiliations

Heavy-ion storage rings have relatively large momentum acceptance which allows for multiple ion species to circulate at the same time. This needs to be considered in radioactive decay measurements of highly charged ions, where atomic charge exchange reactions can significantly alter the intensities of parent and daughter ions. In this study, we investigate this effect using the decay curves of ion numbers in the recent 205Tl81+ bound-state beta decay experiment conducted using the Experimental Storage Ring at GSI Darmstadt. To understand the intricate dynamics of ion numbers, we present a set of differential equations that account for various atomic and nuclear reaction processes—bound state beta decay, atomic electron recombination and capture, and electron ionization. By incorporating appropriate boundary conditions, we develop a set of differential equations that accurately simulate the decay curves of various simultaneously stored ions in the storage ring: 205Tl81+, 205Pb81+, 205Pb82+, 200Hg79+, and 200Hg80+. Through a quantitative comparison between simulations and experimental data, we provide insights into the detailed reaction mechanisms governing stored heavy ions within the storage ring. Our approach effectively models charge-changing processes, reduces the complexity of the experimental setup, and provides a simpler method for measuring the decay half-lives of highly charged ions in storage rings.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2570648
Report Number(s):
LA-UR--25-25675; 1434-601X; 10.1140/epja/s10050-025-01597-3
Journal Information:
European Physical Journal. A, Hadrons and Nuclei (Online), Journal Name: European Physical Journal. A, Hadrons and Nuclei (Online) Journal Issue: 6 Vol. 61; ISSN 1434-601X
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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