Elsevier

Nuclear Physics A

Volume 481, Issue 3, 9 May 1988, Pages 559-576
Nuclear Physics A

Deformation of 126Ce

https://doi.org/10.1016/0375-9474(88)90345-4Get rights and content

Abstract

The gamma decays of excited states in the nucleus 126Ce have been identified in a study of the 92Mo(40Ca, α2p)126Ce reaction at 150–200 MeV bombarding energy using multiple particle-gamma coincidence techniques. Measurements were made of gamma-ray angular distributions and production cross sections as a function of energy. The lifetimes of the lowest states in the ground state band of 126Ce were measured using the recoil distance method. The first excited state was found to have a meanlife of τm = 949 ± 53 ps, which is consistent with a ground state quadrupole deformation of ε2 = 0.28 ± 0.01 assuming axial symmetry and a uniform charge distribution. In the ground state rotational sequence a backbend is observed at h̵wc ≏ 0.32 MeV. This appears to be due to the alignment of h112 protons. These properties are compared with the results of potential energy surface and cranked shell model calculations and are assessed in the context of the systematic behaviour of even-even nuclei in this mass region.

References (37)

  • P.J. Nolan et al.

    Phys. Lett.

    (1982)
  • W. Dehnhardt et al.

    Nucl. Phys.

    (1974)
  • A. Zemel et al.

    Nucl. Phys.

    (1982)
  • D. Husar et al.

    Nucl. Phys.

    (1977)
  • F. Pühlhofer

    Nucl. Phys.

    (1977)
  • J.O. Newton et al.

    Nucl. Phys.

    (1973)
  • L. Grodzins

    Phys. Lett.

    (1962)
  • P. Möller et al.

    At. Data Nucl. Data Tables

    (1981)
  • R. Bengtsson et al.

    Nucl. Phys.

    (1979)
  • D. Ward et al.

    Phys. Lett.

    (1975)
  • R.F. Casten

    Nucl. Phys.

    (1985)
  • D.J. Rowe

    Nucl. Phys.

    (1970)
  • N.G. Nicolis et al.

    Phys. Rev.

    (1986)
  • D.M. Todd et al.

    J. of Phys.

    (1984)
  • J. Gizon et al.

    Nucl. Phys.

    (1977)
  • R. Aryaeinejad et al.

    J. of Phys.

    (1984)
  • P.J. Nolan et al.

    J. of Phys.

    (1985)
  • R.M. Diamond
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    Permanent address: Institute of Experimental Physics, Warsaw University, Warsaw, Poland.

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