Quenching of the proton $\pi 0p_{3/2}$-$\pi 0p_{1/2}$ spin-orbit splitting in ${}^{20}$O and the effect of the tensor force

J. Lois-Fuentes, B. Fernández-Domínguez, T. Roger +37

We present the first direct measurement of the Z=6 shell gap in the neutron-rich 20O nucleus. The one-proton removal transfer reaction 2H(20O,3He)19N has been studied using the ACT…