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Discovery of a new long-lived isomeric state in 125Ce

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Abstract.

A new long-lived isomeric state in the near proton dripline nucleus 125Ce has been identified with Schottky mass spectrometry at GSI. The excitation energy E * = 103(12)keV and the decay time of 193(1)s have been obtained from a single stored fully ionized 125mCe58+ ion. The data implies an E3 transition and a 1/2+ assignment for the spin of the isomer.

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Authors and Affiliations

  1. School of Physics and MOE Key Laboratory of Heavy Ion Physics, Peking University, 100871, Beijing, China

    B. Sun & J. Meng

  2. Gesellschaft für Schwerionenforschung GSI, 64291, Darmstadt, Germany

    B. Sun, Yu. A. Litvinov, K. Beckert, P. Beller, F. Bosch, D. Boutin, C. Brandau, C. Dimopoulou, H. Geissel, R. Knöbel, C. Kozhuharov, S. A. Litvinov, M. Mazzocco, C. Nociforo, F. Nolden, C. Scheidenberger, M. Steck, H. Weick & M. Winkler

  3. Justus-Liebig Universität, 35392, Giessen, Germany

    Yu. A. Litvinov, D. Boutin, C. Brandau, L. Chen, H. Geissel, R. Knöbel, S. A. Litvinov, W. R. Plass & C. Scheidenberger

  4. Department of Physics, University of Surrey, GU2 7XH, Guildford, UK

    P. M. Walker

  5. Warsaw University, Hoza 69, 00-681, Warszawa, Poland

    J. Kurcewicz

Authors
  1. B. Sun
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  2. Yu. A. Litvinov
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  3. P. M. Walker
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  4. K. Beckert
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  5. P. Beller
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  6. F. Bosch
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  7. D. Boutin
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  8. C. Brandau
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  9. L. Chen
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  10. C. Dimopoulou
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  11. H. Geissel
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  12. R. Knöbel
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  13. C. Kozhuharov
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  14. J. Kurcewicz
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  15. S. A. Litvinov
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  16. M. Mazzocco
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  17. J. Meng
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  18. C. Nociforo
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  19. F. Nolden
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  20. W. R. Plass
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  21. C. Scheidenberger
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  22. M. Steck
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  23. H. Weick
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  24. M. Winkler
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Corresponding author

Correspondence to B. Sun.

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R. Krücken

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Sun, B., Litvinov, Y.A., Walker, P.M. et al. Discovery of a new long-lived isomeric state in 125Ce. Eur. Phys. J. A 31, 393–394 (2007). https://doi.org/10.1140/epja/i2006-10252-0

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  • DOI: https://doi.org/10.1140/epja/i2006-10252-0

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