Magnetic moment of 57Ni

In a recent experimental study, the magnetic moment of the ground state of ⁵⁷Ni has been measured to be equal to |μ| = 0.88 +/- 0.06 μ_N, which is only about 45 per cent of the Schmidt value. The significant departure from the Schmidt value is explained in a microscopic, parameter-free manner employing the improved effective interactions in the 2p-1f shell. Quite contrary to the results obtained in a number of recent calculations, it turns out that the observed magnetic moment for ⁵⁷Ni ground state is not inconsistent with the zeroth-order description of the ⁵⁶Ni 0848 ground state in terms of an inert f_7/2 core.

Present address: Institut für Theoretische Kernphysik der Universität Bonn, Nussallee 14-16, Bonn (Fed. Rep. of Germany).