Elsevier

Nuclear Physics A

Volume 501, Issue 1, 11 September 1989, Pages 157-187
Nuclear Physics A

Configuration-dependent deformations in 171Re

https://doi.org/10.1016/0375-9474(89)90570-8Get rights and content

Abstract

The level scheme of 17175Re96, has been studied using (heavy ion, xnyp) reactions. Rotational bands associated with the one-quasiproton Nilsson configurations 52+[402], 12+[411] and92[514] and the “cross-shell” orbitals from the h92 and i132 protons (nominally 120[541] and 12+[660]) have been identified. Less extensive results for 173Re have also been obtained. Differing (configuration dependent) deformations are required to explain the frequencies and alignment gains in the neutron band crossings. The relative differences are consistent with predicted deformation changes in the “deformation-driving” h92 and i132(proton) orbitals. Signature splitting in 92−[514] and 52+[402] bands at low spin suggests some γ-deformation. Competing in-band and out-of-band E2 decays in the region of the “real” crossing between the 12+[660] and 52+[402] bands are explained through particle-rotor band-mixing calculations with the ad hoc inclusion of ΔN = 2 mixing. Limited agreement between the observed 1-quasiparticle energies and predicted values underlines the limitation of currently accepted nuclear potentials in this region. Small alignment gains in the 52+[402] and 12+[411] bands, before the AB neutron alignment can be related to the low-spin anomaly in 172Os and explained using three-band mixing. The absence of a similar effect in the 92[514] band is discussed.

References (39)

  • A. Neskakis et al.

    Nucl. Phys.

    (1976)
  • A. Faessler et al.

    Nucl. Phys.

    (1977)
  • A. Faessler et al.

    Nucl. Phys.

    (1978)
  • J.D. Garrett et al.

    Phys. Lett.

    (1982)
  • A.J. Larabee et al.

    Phys. Lett.

    (1986)
  • R. Bengtsson et al.

    Phys. Lett.

    (1987)
  • J.L. Durell et al.

    Phys. Lett.

    (1982)
  • G.D. Dracoulis et al.

    Nucl. Phys.

    (1988)
  • J. Bacelar et al.

    Nucl. Phys.

    (1985)
  • R. Bengtsson et al.

    At. Data Nucl. Data Tables

    (1986)
  • R. Bengtsson et al.

    Nucl. Phys.

    (1979)
    R. Bengtsson et al.

    Nucl. Phys.

    (1979)
  • S.A. Hjorth et al.

    Nucl. Phys.

    (1970)
  • G.D. Dracoulis et al.

    Nucl. Phys.

    (1979)
    G.D. Dracoulis et al.

    Nucl. Phys.

    (1980)
  • W. Nazarewicz, M. Riley, J.D. Garrett and J. Dudek, to be published and private...
  • M.E. Bunker et al.

    Rev. Mod. Phys.

    (1971)
  • T. Bengtsson et al.

    Nucl. Phys.

    (1985)
  • J.-Y. Zhang et al.

    J. of Phys.

    (1987)
  • C.X. Yang

    Phys. Lett.

    (1983)
  • A.J. Larabee et al.

    Phys. Rev.

    (1984)
  • Cited by (0)

    1

    Dept. of Physics and Theoretical Physics, Faculty of Science, Australian National University.

    2

    Permanent address: Sektion Physik, LMU, Universität München, Am Coulombwall 1 D-8046 Garching, Germany.

    3

    Permanent address: Institute of Atomic Energy, Beijing, Peoples' Republic of China.

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