Cluster structures in oxygen isotopes

Abstract

Cluster structures of 16O, 18O and 20O are investigated using the antisymmetrized molecular dynamics (AMD) plus generator coordinate method (GCM). We have found the Kπ=02+ and CT rotational bands of 18O that have prominent 14C+α cluster structure. The clustering systematics are richer in 20O. We suggest the presence of a Kπ=02+ band that is a mixture of the 12C+α+4n and 14C+6He cluster structures. Kπ=03+ and 0- bands that have prominent 16C+α cluster structure are also found.