Cluster Decay of the High-lying excited states in $^{14}$C

A cluster-transfer experiment of Be-9(Be-9,C-14 -> alpha+Be-10)alpha at an incident energy of 45 MeV was carried out in order to investigate the molecular structure in high-lying resonant states in C-14. This reaction is of extremely large Q-value, making it an excellent case to select the reaction mechanism and the final states in outgoing nuclei. The high-lying resonances in C-14 are reconstructed for three sets of well discriminated final states in Be-10. The results confirm the previous decay measurements with clearly improved decay-channel selections and show also a new state at 23.5(1) MeV. The resonant states at 22.4(3) and 24.0(3) MeV decay primarily into the typical molecular states at about 6 MeV in Be-10, indicating a well developed cluster structure in these high-lying states in C-14. Further measurements of more states of this kind are suggested.