The \ (A=70\), \ (T=1\) isobaric multiplet exhibits an anomalous Coulomb energy difference (CED) behavior, with the \ (^70\) Br/\ (^70\) Se pair showing a decrease in CED with increasing spin, contrary to the typical trend observed in other \ (pf\) -shell nuclei. To investigate this phenomenon, a dedicated experiment was carried out at the Heavy Ion Laboratory of the University of Warsaw using an 88 MeV \ (^32\) S beam impinging on a \ (^40\) Ca target. Excited states in \ (A 70\) neutron-deficient nuclides were populated in fusion–evaporation reactions. Gamma rays were measured with the EAGLE spectrometer, whereas the reaction channel identification was provided by the combined set of neutron — NEDA and charged particle — DIAMANT detectors. Preliminary data analysis shows the satisfactory performance of the setup, which will allow for in-depth studies of the structure of the nuclei of interest. Abstract Published by the Jagiellonian University 2026 authors
Duda et al. (Tue,) studied this question.