Radioactive decay of Ni65

The radioactive decay of Ni⁶⁵ was studied on a short-lens spectrometer and on a scintillation spectrometer with a two-hundred-channel amplitude analyzer. By means of a magnetic spectrometer 3 groups of the beta spectrum with energies of 2140±10 keV, 1020±25 keV and 650±30 keV with relative intensities of 58±5%, 11±3% and 30±5% were found. From gamma spectrum measurements the existence of another two beta transitions with energies of 520 keV and 420 keV follows. Seven transitions were found in the gamma spectrum: 370 keV (4·6%), 510 keV (0·37%), 610 keV (0·22%), 1115 keV (17%), 1480 keV (24%), 1620 keV (0·5) and 1720 keV (0·45%). Inasfar as there exist other gamma transitions, they are weaker than 0·03% at decay.