Der Zerfall des Cu61

Theγ-ray-spectrum of Ni⁶¹ associated with the E.C. andΒ ⁺-decay of Cu⁶¹ has been measured with a Ge(Li)-counter. The observed 14 newγ-ray-transitions led to a new level-scheme for this decay with Ni⁶¹-Ievels at: 67.7, 282.9, 656.0, 907.9, 1099.8, 1132.7, 1186.8, 1610.6, 1730.8 and 2128.0 keV. Five of these levels were known from earlier investigations of Cu⁶¹-decay, but all of them could be identified with some of previously reported levels found in scattering experiments. As far as possible spin and parity assignments have been made and are compared with the results of scattering experiments.