The decay of 61Cu nucleus

The decay of 61Cu nucleus has been investigated with Ge(Li) and HpGe detector, semiconductor electron spectrometer and Ge(Li)-NaI γ-γ coincidence spectrometer. 35 γrays from 12 excited levels have been found. The single and coincidence spectra show that 545 keV, 1019keV γ fays and 1019keV energy level are wrong which appear in the 61Cu decay scheme carried in <> (the 7th edition 1978). the halflife time of 61Cu nucleus and the internal conversion coefficient for 67 keV γ-transition are found to be T1/2=207.7±1.6min and α=0.12±0.01 respectively and then a decay scheme is proposed. In this paper more attention ia paid to discussing the energy levels of 1014, 1019, and 1997 keV as well as some weak γ rays