Elsevier

Physics Letters B

Volume 248, Issues 3–4, 4 October 1990, Pages 235-242
Physics Letters B

Prediction of octupole-deformation effects in superdeformed nuclei of A∼150 and A∼190 mass regions and possible interrelation with pseudo-spin symmetry

https://doi.org/10.1016/0370-2693(90)90284-DGet rights and content

Abstract

Stability with respect to axially symmetric but mirror-asymmetric distortions in superdeformed nuclei is analysed. Calculations based on the deformed Woods-Saxon potential and the cranking method together with the generalised Strutinsky approach indicate the existence of octupole-shape driving shell effects persisting up to the very high spin limit in superdeformed nuclei of both A∼150 and A∼190 mass regions. The strongest effects are predicted for Z∼62−68(combined with N∼82−88) and for N∼110–118 (combined with Z∼ 80) particle numbers at quadrupole deformation β2∼0.60 and β2∼0.45, respectively. In both mass ranges the low lying octupole vibrations rather than the static octupole shapes are to be expected in most of the cases. The physical consequences of the above theoretical predictions are discussed in the context of the rotational bands based on the octupole oscillations and the symmetry properties of the decoupling parameter in the K=12 bands.

References (11)

  • G.A. Leander

    Nucl. Phys. A

    (1986)
  • J. Dudek

    Phys. Rev. C

    (1981)
    C. Ćwiok

    Comput. Phys. Commun.

    (1987)
  • J. Byrski

    Phys. Rev. Lett.

    (1990)
  • J. Dudek et al.
  • W. Nazarewicz

    Nucl. Phys. A

    (1986)
    N. Schultz

    Phys. Rev. Lett.

    (1989)
There are more references available in the full text version of this article.

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    Citation Excerpt :

    The complete alignment of pseudospin along the axis of rotation was cited as partially responsible for superdeformed bands in different nuclei having virtually identical moments of inertia [27]. These bands appeared in odd, even–even, and odd–odd nuclei [28–44,26,45]. The triaxial harmonic oscillator was also shown to have pseudospin symmetry as well [46,47].

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This work was partly supported by the Polish Ministry of National Education under Contract CPBP 01.09.

1

Permanent address: Institute of Theoretical Physics, Hoża 69, PL-00-681 Warsaw, Poland.

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