Quadrupole Moments of Neutron-Deficient ${}^{20,21}$Na

K. Minamisono, K. Matsuta, T. Minamisono +8

The electric-quadrupole coupling constant of the ground states of the proton drip line nucleus ${}^{20}$Na($I^{\pi }$ = 2${}^{+}$, $T_{1/2}$ = 447.9 ms) and the neutron-deficient nucleus $^…