Intermediate-energy Coulomb excitation of 30Na

The neutron-rich nucleus 30 Na in the vicinity of the Island of Inversion was investigated using intermediate-energy Coulomb excitation. A single γ-ray transition was observed and attributed to the 3 + 1 → 2 + gs decay. A transition probability of B(E2; 2 + gs → 3 + 1 ) =147(21)e 2 fm 4 was determined and found in agreement with a previous experiment and with large-scale shell-model calculations. Evidence for the strong excitation of the 4 + 1 state predicted by the shell-model calculations was not observed.