JYFL-ACCLAB-JM22: Towards understanding of isospin-breaking effects in isobaric multiplets: In-beam recoil-beta tagging study of 66Se and 66As

These data are aimed to extract the energy differences between the excited T=1 states in the A=66 isobaric multiplet in order to allow investigations of isospin symmetry breaking and other subtle nuclear structure effects. In particular, the nuclei under study were the Tz=-1 nucleus 66Se and Tz=0 nucleus 66As. These nuclei were produced using the 28Si+40Ca fusion-evaporation reaction and identified using the recoil-beta tagging method. This dataset was collected over 7 days of beam time.