Cluster structures in Oxygen isotopes

Abstract

Cluster structure of 16O,18O and 20O is investigated by the antisymmettrized molecular dynamics (AMD) plus generator coordinate method (GCM). We have found the K^π=0${}_2^{+}$ and 0${}_1^{-}$ rotational bands of 18O that have the prominent 14C+αcluster structure. Clustering systematics becomes richer in 20O. We suggest the K^π=0${}_2^{+}$ band that is the mixture of the 12C+α+4n and 14C+6He cluster structures, and the K^π=0${}_1^{-}$ band that has the 14C+6He cluster structure. The K^π=0${}_3^{+}$ and 0${}_2^{-}$ bands that have the prominent 16C+αcluster structure are also found.

9pages, 9figures