Isospin symmetry in the T = 1,A = 62 triplet

Excited states in the Tz=0,-1 nuclei ⁶²Ga and ⁶²Ge were populated in direct reactions of relativistic radioactive ion beams at the RIBF. Coincident γ rays were measured with the DALI2⁺ array and uniquely assigned to the A=62 isobars. In addition, ⁶²Ge was also studied independently at JYFL-ACCLAB using the ²⁴Mg(⁴⁰Ca,2n)⁶²Ge fusion-evaporation reaction. The first excited T=1,Jπ=2+ states in ⁶²Ga and ⁶²Ge were identified at 979(1) and 965(1) keV, respectively, resolving discrepant interpretations in the literature. States beyond the first 2+ state in ⁶²Ge were also identified for the first time in the present work. The results are compared with shell-model calculations in the fp model space. Mirror and triplet energy differences are analyzed in terms of individual charge-symmetry and charge-independence breaking contributions. The MED results confirm the shrinkage of the p-orbits' radii when they are occupied by at least one nucleon on average.