Shape and Structure of N=Z ⁶⁴Ge: Electromagnetic Transition Rates from the Application of the Recoil Distance Method to a Knockout Reaction

Transition rate measurements are reported for the 2₁⁺ and 2₂⁺ states in N=Z ⁶⁴Ge. The experimental results are in excellent agreement with large-scale shell-model calculations applying the recently developed GXPF1A interactions. The measurement was done using the recoil distance method (RDM) and a unique combination of state-of-the-art instruments at the National Superconducting Cyclotron Laboratory (NSCL). States of interest were populated via an intermediate-energy single-neutron knockout reaction. RDM studies of knockout and fragmentation reaction products hold the promise of reaching far from stability and providing lifetime information for excited states in a wide range of nuclei.