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arXiv · 1702.04874

Three-body decay of linear-chain states in $^{14}$C

Tomoyuki Baba·Masaaki Kimura
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Abstract

The decay properties of the linear-chain states in $^{14}$C are investigated by using the antisymmetrized molecular dynamics. The calculation predicts two rotational bands with linear-chain configurations having the $π$-bond and $σ$-bond valence neutrons. For the $π$-bond linear-chain, the calculated excitation energies and the widths of $α$-decay to the ground state of $^{10}{\rm Be}$ reasonably agree with the experimental candidates observed by the $α+{}^{10}{\rm Be}$ resonant scattering. On the other hand, the $σ$-bond linear-chain is the candidate of the higher-lying resonant states reported by the break-up reaction. As the evidence of the $σ$-bond linear-chain, we discuss its decay pattern. It is found that the $σ$-bond linear-chain not only decays to the excited band of $^{10}{\rm Be}$ but also decays to the three-body channel of $^{6}{\rm He}+α+α$, and the branching ratio of these decays are comparable. Hence, we suggest that this characteristic decay pattern is a strong signature of the linear-chain formation and a key observable to distinguish two different linear-chains.

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Tomoyuki Baba, Masaaki Kimura. 2017-02-16. Three-body decay of linear-chain states in $^{14}$C. https://doi.org/10.1103/physrevc.95.064318

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