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One-particle properties of deformed N[approximate]28 odd-N nuclei with weakly bound or resonant neutrons

Ikuko Hamamoto

Phys. Rev. C: Nucl. Phys., vol: 79, num: 1, 5 pages, published: 16 January 2009, 014307

Abstract: Possible deformation of odd-N nuclei with N28 toward the neutron drip line is investigated using the Nilsson diagram based on deformed Woods-Saxon potentials. Both weakly-bound and resonant one-particle levels are properly obtained by directly solving the Schrödinger equation in mesh of space coordinate with the correct boundary condition. If we use the same diffuseness of the potential as that of -stable nuclei, the energy difference between the neutron 2p3/2 and 1f7/2 levels becomes very small or the N=28 energy gap almost disappears, as the binding energies of those levels approach zero. This suggests that the ground states of those neutron drip line nuclei are likely to be deformed. In particular, the spin-parity and the magnetic moment of the ground state of odd-N nuclei, 1643 align=middle/S27 and 1645 align=middle/S29, are examined. Moreover, it is suggested that in 1239 align=middle/Mg27 lying outside the drip line the lowest resonant state may have 5/2-, if the N=28 energy gap almost vanishes.


   Atomic nucleus.
      Nuclear structure.
         Shell model.
            Properties of single-particle shell-model states in deformed nuclei. Two-center shell model.

   Atomic nucleus.
      Nuclear structure.
         Structure of deformed nuclei.
            Singlparticle states in deformed nuclei.

   Atomic nucleus.
      Nuclear structure.
         Structure of deformed nuclei.
            Specific properties of deformed nuclei (parameters of deformation, momenta of inertia, rotational spectra).

   Atomic nucleus.
      Nuclear structure.
         Unstable nuclear states.
            Resonant nuclear states. Structure of continuum nuclear spectrum.

   Atomic nucleus.
      Nuclear structure.
         Unstable nuclear states.
            Nuclear structure near drip-lines. Neutron and proton halos.

   Atomic nucleus.
      Basic nuclear properties. Properties of particular nuclei.
         Properties of particular nuclei (theory).
            Z=13÷18.

   Atomic nucleus.
      Basic nuclear properties. Properties of particular nuclei.
         Properties of particular nuclei (theory).
            Z=9÷12.

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