Investigation of 9Be from a nonlocalized clustering concept

The nonlocalized aspect of clustering, which is a new concept for self-conjugate nuclei, is extended for the investigation of the N not equal Z nucleus Be-9. A modified version of the Tohsaki-Horiuchi-Schuck-Ropke (THSR) wave function is introduced with a new phase factor. It is found that the constructed negative-parity THSR wave function is very suitable for describing the cluster states of Be-9. Namely, the nonlocalized clustering is shown to prevail in Be-9. The calculated binding energy and radius of Be-9 are consistent with calculations in other models and with experimental values. The squared overlaps between the single THSR wave function and the Brink + generator coordinate method wave function for the 3/2(-) rotational band of Be-9 are found to be near 96%. Furthermore, by showing the density distribution of the ground state of Be-9, the p-orbit structure is naturally reproduced by using this THSR wave function.