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Collective excitations induced by pairing anti-halo effect

Masayuki Yamagami
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Abstract

Important features of low-frequency collective vibrational excitations in neutron drip line nuclei are studied. We emphasize that pairing anti-halo effect in the Hartree-Fock-Bogoliubov (HFB) theory play crucial roles to realize collective motions in loosely bound nuclei. We study the spatial properties of one particle - one hole (1p-1h) states with/without selfconsistent pairing correlations by solving simplified HF(B) equations in coordinate space. Next, by performing Skyrme-HFB plus selfconsistent quasiparticle random phase approximation (QRPA) we investigate the first 2+ states in neutron rich Ni isotopes. Three types of calculations, HFB plus QRPA, resonant BCS plus QRPA, and RPA are compared.

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Masayuki Yamagami. 2004-04-10. Collective excitations induced by pairing anti-halo effect. https://doi.org/10.1140/epjad%2Fi2005-06-130-1

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