Suppression of core polarization in halo nuclei

Abstract

We present a microscopic study of halo nuclei, starting from the Paris and Bonn potentials and employing a two-frequency shell model approach. It is found that the core-polarization effect is dramatically suppressed in such nuclei. Consequently the effective interaction for halo nucleons is almost entirely given by the bare G-matrix alone, which presently can be evaluated with a high degree of accuracy. The experimental pairing energies between the two halo neutrons in ${}^6$He and ${}^{11}$Li nuclei are satisfactorily reproduced by our calculation. It is suggested that the fundamental nucleon-nucleon interaction can be probed in a clearer and more direct way in halo nuclei than in ordinary nuclei.

11 pages, RevTex, 2 postscript figures; major revisions, matches version to appear in Phys. Rev. Letters

References in corpus (1)

• Matter radii of light halo nuclei

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