4$\alpha$ linear-chain state produced by $^{9}$Be+$^{9}$Be collision

TL;DR

This paper investigates the potential existence of a linear-chain state in $^{18}$O formed by $^{9}$Be+$^{9}$Be collisions, predicting its properties and suggesting experimental verification methods.

Contribution

The study predicts specific properties of a $4 extalpha+2n$ linear-chain state in $^{18}$O and proposes experimental verification via $^{9}$Be+$^{9}$Be collisions.

Findings

Predicted excitation energies and decay widths of the linear-chain state.

Identification of $K^^-$ linear-chain states as experimentally verifiable.

Use of antisymmetrized molecular dynamics for state prediction.

Abstract

Extreme nuclear deformations provide great insight into the geometric formation of quantum many-body systems. In this work, the $4\alpha+2n$ linear chain is assessed in $^{18}$O. We predict excitation energies, moment-of-inertia, $\alpha$-, and $^{9}$Be-decay widths by using the antisymmetrized molecular dynamics. We show that the $K^\pi=3^-$ linear-chain states may be verified by the head-on $^{9}{\rm Be}+{}^{9}{\rm Be}$ collision experiments.