Beyond the Core+n+n Model Based on the Complex Scaling Method

概要

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We proposed a new model of core+neutrons in which degrees of freedom in the core cluster are taken into consideration on an equal footing with the weakly-binding motion of valence neutrons. The coupling between these degrees of freedom was solved by employing OCM to treat the antisymmetrization. It was discussed that such a dynamical coupling is very important in ^10Li and ^110Li but less important in ^6He. The coupling in ^6He can be treated in a perturbative way in the ^4He+n+n model. However, the couplings in ^10Li and ^11Li are shown to have to be solved explicitly by using coupled channel frameworks, where the Pauli principle between valence and core neutrons plays an important role. We here took the pairing correlation as an important degree of freedom in the core cluster. It was shown that the Pauli blocking effect can explain a degeneracy of p- and s-orbital energies in the spectroscopy of ^10Li. The ^9Li-n interaction is shown to have a strong state dependence which works more attractively for s-orbit than for p-orbit. However, in ^11Li, it was shown that, in addition to the Pauli blocking effect on the pairing correlation in the ^9Li core, a spatially extend tail of the ^9Li-n potential is needed to reproduce a large amplitude of s-wave valence neutron configurations. Taking these effects, we can explain the properties of ^10Li and ^11Li consistently.
理論物理学刊行会の論文
2002-12-26