Advertisement

The European Physical Journal A

, Volume 31, Issue 3, pp 393–394 | Cite as

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

  • B. Sun
  • Yu. A. Litvinov
  • P. M. Walker
  • K. Beckert
  • P. Beller
  • F. Bosch
  • D. Boutin
  • C. Brandau
  • L. Chen
  • C. Dimopoulou
  • H. Geissel
  • R. Knöbel
  • C. Kozhuharov
  • J. Kurcewicz
  • S. A. Litvinov
  • M. Mazzocco
  • J. Meng
  • C. Nociforo
  • F. Nolden
  • W. R. Plass
  • C. Scheidenberger
  • M. Steck
  • H. Weick
  • M. Winkler
Special Article - Scientific Note

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 125m Ce58+ ion. The data implies an E3 transition and a 1/2+ assignment for the spin of the isomer.

PACS.

21.10.Dr Binding energies and masses 21.10.Tg Lifetimes 23.20.Lv γ transitions and level energies 

References

  1. 1.
    E.S. Paul, Phys. Rev. C 58, 801 (1998).CrossRefADSGoogle Scholar
  2. 2.
    C.M. Petrache, Eur. Phys. J. A 14, 439 (2002).CrossRefADSGoogle Scholar
  3. 3.
    J.F. Smith, Phys. Rev. C 69, 034339 (2004).CrossRefADSGoogle Scholar
  4. 4.
    H. Geissel, Nucl. Instrum. Methods B 70, 286 (1992).CrossRefADSGoogle Scholar
  5. 5.
    B. Franzke, Nucl. Instrum. Methods B 24/25, 18 (1987).Google Scholar
  6. 6.
    M. Steck, Nucl. Instrum. Methods A 532, 357 (2004).CrossRefADSGoogle Scholar
  7. 7.
    Yu.A. Litvinov, Nucl. Phys. A 756, 3 (2005).CrossRefADSGoogle Scholar
  8. 8.
    P.M. Walker, G.D. Dracoulis, Hyperfine Interact. 135, 83 (2001).CrossRefADSGoogle Scholar
  9. 9.
    Yu.A. Litvinov, Phys. Lett. B 573, 80 (2003).CrossRefADSGoogle Scholar
  10. 10.
    T. Ohtsubo, Phys. Rev. Lett. 95, 052501 (2005).CrossRefADSGoogle Scholar
  11. 11.
    T. Radon, Nucl. Phys. A 677, 75 (2000).CrossRefADSGoogle Scholar
  12. 12.
    Yu.A. Litvinov, arXiv:/nucl-ex/0509019.Google Scholar
  13. 13.
    H. Geissel, Yu.A. Litvinov, J. Phys. G 31, 1779 (2005).CrossRefGoogle Scholar
  14. 14.
    K.-H. Schmidt, Z. Phys. A 316, 19 (1984).CrossRefGoogle Scholar
  15. 15.
    G. Audi, Nucl. Phys. A 729, 3 (2003).CrossRefADSGoogle Scholar
  16. 16.
    F. Rösel, At. Data Nucl. Data Tables 21, 91 (1978).CrossRefADSGoogle Scholar

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • B. Sun
    • 1
    • 2
  • Yu. A. Litvinov
    • 2
    • 3
  • P. M. Walker
    • 4
  • K. Beckert
    • 2
  • P. Beller
    • 2
  • F. Bosch
    • 2
  • D. Boutin
    • 2
    • 3
  • C. Brandau
    • 2
    • 3
  • L. Chen
    • 3
  • C. Dimopoulou
    • 2
  • H. Geissel
    • 2
    • 3
  • R. Knöbel
    • 2
    • 3
  • C. Kozhuharov
    • 2
  • J. Kurcewicz
    • 5
  • S. A. Litvinov
    • 2
    • 3
  • M. Mazzocco
    • 2
  • J. Meng
    • 1
  • C. Nociforo
    • 2
  • F. Nolden
    • 2
  • W. R. Plass
    • 3
  • C. Scheidenberger
    • 2
    • 3
  • M. Steck
    • 2
  • H. Weick
    • 2
  • M. Winkler
    • 2
  1. 1.School of Physics and MOE Key Laboratory of Heavy Ion PhysicsPeking UniversityBeijingChina
  2. 2.Gesellschaft für Schwerionenforschung GSIDarmstadtGermany
  3. 3.Justus-Liebig UniversitätGiessenGermany
  4. 4.Department of PhysicsUniversity of SurreyGuildfordUK
  5. 5.Warsaw UniversityWarszawaPoland

Personalised recommendations