Identification of New β-Delayed γ Rays and a Low-Spin Isomer in 176Ir

The ?+/EC decay of doubly odd nucleus 176Ir has been studied via the 146Nd(35Cl, 5n?) heavy ion fusion evaporation reaction at 210?MeV bombarding energy. With the aid of a helium-jet recoil fast tape transport system, the reaction products were transported to a low-background location for measurement. Based on the data analysis, the previously known ? rays from the decay of 176Ir are proven. Moreover, three new excited levels and ten new ? rays are assigned to 176Os. The time spectra of typical ? rays clearly indicate a long-lived low-spin isomer in 176Ir.