Novel cluster states in $^{10}$Be

TL;DR

This paper predicts new cluster states in $^{10}$Be with distinct structures, using a hybrid model, and suggests experimental signatures for their detection.

Contribution

It introduces a hybrid model combining dineutron condensate and $^6$He+$ ext{alpha}$ cluster wave functions to predict novel cluster states in $^{10}$Be.

Findings

Two types of cluster states are theoretically proposed.

Predicted states have distinct gas-like and extended structures.

Properties like monopole transition strengths are suggested for experimental detection.

Abstract

Cluster structures of excited $^{10}$Be states are investigated with a hybrid model of dineutron condensate wave functions and $^6$He+$\alpha$ cluster wave functions. Two kinds of cluster states are theoretically suggested a few MeV above the $\alpha+\alpha+n+n$ threshold energy. They have quite distinct cluster structure; ones have gas-like structures of $\alpha+\alpha$+dineutron, and the others have $^6$He+$\alpha$ with extremely extended an $\alpha$ cluster. Although these cluster states have not been confirmed experimentally yet, theoretically suggested properties of these states such as monopole transition strengths and $\alpha$-decay widths may be helpful for possible experimental observation.