Cluster structures of excited states in $^{14}$C

Structures of excited states in $^{14}$C are investigated with a method of $β$-$γ$ constraint antisymmetrized molecular dynamics in combination with the generator coordinate method. Various excited states with the developed $3α$-cluster core structures are suggested in positive- and negative-parity states. In the positive-parity states, triaxial deformed and linear-chain structures are found to construct excited bands. Interestingly, $^{10}$Be+$α$ correlation is found in the cluster states above the $^{10}$Be+$α$ threshold energy.

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