Level Inversion and the Mean Field in 11Be

  • The inversion of 2s1/2 and 1p1/2 levels occurred in the one-neutron halo nucleus,11Be, is studied in detail. It is pointed out that, for neutron halo nuclei, such as 11Be, the one neutron separation energy, Sn, and the depth of the last neutron in the potential well, Dg, should have quite different values. After the failure of the Woods-Saxon potential, we construct a new potential, called as Double modified-Woods-Saxon (DMWS) potential, to describe the mean field of 11Be, which has been able perfectly to reproduce this level inversion phenomenon without the help of configuration mixing. It has been shown that the level inversion in the 11Be may indicate that the halo nuclei have a quite different mean field in contrast to the stable ones.
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GAO Zao-Chun and CHEN Yong-Shou. Level Inversion and the Mean Field in 11Be[J]. Chinese Physics C, 2003, 27(12): 1100-1105.
GAO Zao-Chun and CHEN Yong-Shou. Level Inversion and the Mean Field in 11Be[J]. Chinese Physics C, 2003, 27(12): 1100-1105. shu
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Received: 2003-04-10
Revised: 1900-01-01
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Level Inversion and the Mean Field in 11Be

    Corresponding author: GAO Zao-Chun,
  • China Institute of Atomic Energy,Beijing 102413,China2 Institute of Theoretic Physics,CAS,Beijing 100080,China

Abstract: The inversion of 2s1/2 and 1p1/2 levels occurred in the one-neutron halo nucleus,11Be, is studied in detail. It is pointed out that, for neutron halo nuclei, such as 11Be, the one neutron separation energy, Sn, and the depth of the last neutron in the potential well, Dg, should have quite different values. After the failure of the Woods-Saxon potential, we construct a new potential, called as Double modified-Woods-Saxon (DMWS) potential, to describe the mean field of 11Be, which has been able perfectly to reproduce this level inversion phenomenon without the help of configuration mixing. It has been shown that the level inversion in the 11Be may indicate that the halo nuclei have a quite different mean field in contrast to the stable ones.

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