Evidence for partial rotation alignment in proton emitting Pr

Using nonadiabatic quasiparticle calculations we reproduce the experimental half-life for proton radioactivity in ¹²¹Pr assuming that the decaying state has angular momentum Jπ=7/²⁻$J^{\pi }=7/2^{-}$, thus showing for the first time clear evidence for partial rotation alignment in a proton emitting nucleus. The treatment of the pairing interaction in the BCS approach produces profound changes in the ordering of energy levels, and at high deformation, the state 7/²⁻$7/2^{-}$ coming from the h_11/2${\mathrm{h}}_{11/2}$ spherical shell becomes the bandhead.