Triplet energy differences and the low lying structure of $^{62}$Ga

International audienceBackground: Triplet energy differences (TED) can be studied to yield information on isospin-non-conservinginteractions in nuclei.Purpose: The systematic behavior of triplet energy differences (TED) of T = 1, J π = 2+ states is examined. TheA = 62 isobar is identified as having a TED value that deviates significantly from an otherwise very consistenttrend. This deviation can be attributed to the tentative assignments of the pertinent states in 62Ga and 62Ge.Methods: An in-beam γ -ray spectroscopy experiment was performed to identify excited states in 62Ga usingGamma-Ray Energy Tracking In-Beam Nuclear Array with the S800 spectrometer at NSCL using a two-nucleonknockout approach. Cross-section calculations for the knockout process and shell-model calculations have beenperformed to interpret the population and decay properties observed.Results: Using the systematics as a guide, a candidate for the transition from the T = 1, 2+ state is identified.However, previous work has identified similar states with different J π assignments. Cross-section calculationsindicate that the relevant T = 1, 2+ state should be one of the states directly populated in this reaction.Conclusions: As spins and parities were not measurable, it is concluded that an unambiguous identification ofthe first T = 1, 2+ state is required to reconcile our understanding of TED systematics