g factor of the 2+1 state of 170Hf

The g factor of the 2 + 1 state of 170 Hf was measured by perturbed γ-γ angular correlation in a static external magnetic field. The result, g(2 + 1 ) = 0.28(5), extends the systematics of g factors of even-even Hf isotopes to N = 98 and enables a better test of theoretical models. The g(2 + 1 ) experimental values of these isotopes exhibit a remarkable constancy as a function of neutron number. This phenomenon, which was also observed for other isotopic chains in the Gd-W range, is explained in terms of a recently proposed empirical model.