Abstract
The lifetimes of fourteen states in 60Ni, ranging in excitation energy between 3.0 and 4.3 MeV, were measured through the Doppler-shift attenuation method. In addition a lower limit was set for the lifetime of the 2626.2 keV 3+ 1 level. The states were excited through the 60Ni(p, ṕγ) reaction with 7 MeV protons. Singles γ-ray spectra were obtained with a 55 cm 3 Ge(Li) detector at θ γ = 0°, 90° and 160°. Since the recoil direction of the 60Ni★ nuclei was undefined in these measurements, an averaging of the attenuation factor was performed and the influence of this averaging on the error limits was explored. The averaged attenuation factor was also calibrated with respect to known lifetimes in 58Ni. With the help of recent information on electromagnetic decay properties in 60Ni, transition strengths were calculated for the levels considered in this experiment.
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