Cluster structures in Oxygen isotopes

TL;DR

This paper investigates cluster structures in oxygen isotopes 16O, 18O, and 20O using AMD and GCM methods, revealing multiple rotational bands with prominent cluster configurations and systematics.

Contribution

It introduces detailed cluster structure analysis in oxygen isotopes, identifying new rotational bands and their specific cluster configurations, advancing understanding of nuclear clustering phenomena.

Findings

Identified K^{ u}=0_2^+ and 0_1^- bands in 18O with 14C+ extalpha clustering.

Discovered richer clustering systematics in 20O, including mixed and pure cluster bands.

Found prominent 16C+ extalpha cluster structures in specific bands.

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^{\pi}=0$_2^+$ and 0$_1^-$ rotational bands of 18O that have the prominent 14C+\alpha cluster structure. Clustering systematics becomes richer in 20O. We suggest the K^{\pi}=0$_2^+$ band that is the mixture of the 12C+\alpha+4n and 14C+6He cluster structures, and the K^{\pi}=0$_1^-$ band that has the 14C+6He cluster structure. The K^{\pi}=0$_3^+$ and 0$_2^-$ bands that have the prominent 16C+\alpha cluster structure are also found.