Gamov-Teller transitions from 14N ground to 14C ground and excited states

Abstract

Gamov-Teller transitions from the ${}^{14}$N ground state to the ${}^{14}$C ground and excited states were investigated, based on the model of antisymmetrized molecular dynamics. The calculated strengths for the allowed transitions to the $0^{+}$, $1^{+}$, and $2^{+}$ states of ${}^{14}$C were compared with the experimental data measured by high-resolution charge-exchange reactions. The calculated GT transition to the $2_1^{+}$ state is strong while those to the $0_{2,3}^{+}$ and $2_{2,3}^{+}$ states having dominant $2\hslash \omega$ excited configurations are relatively weak. The present calculation can not describe the anonymously long life time of ${}^{14}$C, though the strength of the ${}^{14}$C ground state is somewhat suppressed because of the cluster (many-body) correlation in the ground states of ${}^{14}$C and ${}^{14}$N.

Comments: 10 pages, 7 figures