Evolution of the $E(1/2_1^{+})-E(3/2_1^{+})$ energy spacing in odd-mass K, Cl and P isotopes for $N=20-28$

A. Gade, B. A. Brown, D. Bazin +16

The energy of the first excited state in the neutron-rich N=28 nucleus 45Cl has been established via in-beam gamma-ray spectroscopy following proton removal. This energy value comp…