Abstract
Based on the cluster-core model, the effects of nuclear deformations and orientations on the halo structure of the observed and proposed cases of neutron-halo nuclei is analyzed. The calculations are performed for the deformed structures using quadrupole (β2) deformations with ‘optimum’ orientations as well as including higher multipole deformations (β2-β4) with the ‘compact’ (hot) orientations. The interesting result is that, although potential energy surfaces are modified with the inclusion of deformation effects up to β2, but the 1n- and 2n-halo nature remains intact for almost all cases investigated here, except for 17B and 22C nuclei. However, in some cases (22O, 26F, 27F), the choice of higher multipole deformations up to hexadecapole is shown to be rather sensitive. In addition, the relevance of the use of different nuclear proximity potentials is also explored in the context of the halo nature of neutron-rich light nuclei. The possible role of Q-value and angular momentum effects are also addressed.
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