Selective decay from a candidate of the $\ddot{I}ƒ$-bond linear-chain state in ${}^{14}$C

Abstract

A cluster-transfer experiment ${}^9$Be(${}^9$Be,${}^{14}$C${}^{\ast }\to \hat{I}\pm$+${}^{10}$Be)$\hat{I}\pm$ was carried out using an incident beam energy of 45 MeV. This reaction channel has a large $Q$-value that favors populating the high-lying states in ${}^{14}$C and separating various reaction channels. A number of resonant states are reconstructed from the forward emitting ${}^{10}$Be + $\hat{I}\pm$ fragments with respect to three sets of well discriminated final states in ${}^{10}$Be, most of which agree with the previous observations. A state at 22.5(1) MeV in ${}^{14}$C is found to decay predominantly into the states around 6 MeV in ${}^{10}$Be daughter nucleus, in line with the unique property of the predicted band head of the $\ddot{I}ƒ$-bond linear-chain molecular states. A new state at 23.5(1) MeV is identified which decays strongly into the first excited state of ${}^{10}$Be.

6 pages, 4 figures