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High-spin states and band structures in the doubly odd 136La nucleus

  • S. J. ZhuEmail author
  • S. D. Xiao
  • X. L. Che
  • Y. N. U
  • M. L. Li
  • Y. J. Chen
  • L. H. Zhu
  • G. S. Li
  • S. X. Wen
  • X. G. Wu
Original Article

Abstract.

High-spin states of 136La have been investigated with the reaction 130Te( 11B, 5n) at a beam energy of 60 MeV. The level scheme with three collective bands has been updated with spin up to 20 ℏ. The observed πh 11/2 ⊗ νh 11/2 band shows γ-instability with increasing spin according to the TRS calculations. The band crossing and the signature splitting and inversion have been discussed. Other two collective bands based on 12-and 16+ levels were proposed as oblate deformation with γ ∼ -60°. They most probably originate from four- and six-quasiparticle configurations, that is, πh 11/2 ⊗ νg 7/2 h 11/2 2 and πg 7/2 ⊗ νg 7/2 2 d 5/2 h 11/2 2 respectively.

PACS.

23.20.Lv γ transitions and level energies 21.10.Re Collective levels 21.60.Ev Collective models 

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References

  1. 1.
    E.S. Paul , Phys. Rev. Lett. 58, 984 (1987).ADSGoogle Scholar
  2. 2.
    G. Andersson , Nucl. Phys. A 268, 205 (1976).ADSGoogle Scholar
  3. 3.
    E.S. Paul , Phys. Rev. C 40, 1255 (1989).ADSGoogle Scholar
  4. 4.
    R.A. Bark , Nucl. Phys. A 691, 577 (2001).ADSGoogle Scholar
  5. 5.
    P. Luo , High Energy Phys. Nucl. Phys. 28, 495 (2004) (in Chinese).ADSGoogle Scholar
  6. 6.
    S.J. Zhu , Phys. Rev. C 62, 044310 (2000).ADSGoogle Scholar
  7. 7.
    S.J. Zhu , Chin. Phys. Lett. 16, 635 (1999).CrossRefGoogle Scholar
  8. 8.
    G. Rainovski , J. Phys. G 29, 2763 (2003).ADSGoogle Scholar
  9. 9.
    Y. Liu , Phys. Rev. C 54, 719 (1996).ADSGoogle Scholar
  10. 10.
    T. Morek , Nucl. Phys. A 433, 159 (1985).ADSGoogle Scholar
  11. 11.
    E.W. Cybulska , Acta Phys. Pol. B 32, 929 (2001).ADSGoogle Scholar
  12. 12.
    D.C. Radford, Nucl. Instrum. Methods A 361, 297 (1995).ADSGoogle Scholar
  13. 13.
    V. Kumar , Eur. Phys. J. A 17, 153 (2003).ADSGoogle Scholar
  14. 14.
    R. Bengtsson , Nucl. Phys. A 237, 139 (1972).Google Scholar
  15. 15.
    S. Frauendorf , Phys. Lett. B 100, 219 (1981).ADSGoogle Scholar
  16. 16.
    S. Frauendorf , Phys. Lett. B 125, 219 (1983).Google Scholar
  17. 17.
    K. Hauschild , Phys. Rev. C 54, 613 (1996).ADSGoogle Scholar

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  • S. J. Zhu
    • 1
    Email author
  • S. D. Xiao
    • 1
  • X. L. Che
    • 1
  • Y. N. U
    • 1
  • M. L. Li
    • 1
  • Y. J. Chen
    • 1
  • L. H. Zhu
    • 2
  • G. S. Li
    • 2
  • S. X. Wen
    • 2
  • X. G. Wu
    • 2
  1. 1.Department of PhysicsTsinghua UniversityBeijingPRC
  2. 2.China Institute of Atomic EnergyBeijingPRC

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