g-factors in Neutron Rich Ce and Nd Isotopes

We have recently developed a method for measuring the g-factors of excited states of neutron rich fragments produced in the spontaneous fission of $^{252}$Cf. With this method, we are able to determine angular correlations between prompt gamma-rays emitted from the fragments. The determination of g-factors is accomplished by measuring the attenuation of the expected angular correlation, caused by the interaction of the fragment with the randomly oriented hyperfine fields of an un-magnetized iron foil. Using our high statistics data set ($\sim$ 4 $\times$10$^{11}$ triple coincidence events), we have measured the previously unknown g-factors of the 4$^+$ state in $^{150}$Nd and the 6$^+$ state in $^{152}$Nd. We have also re-measured g-factors of the 2$^+$ states in $^{146,148}$Ce, significantly reducing errors. We will show that, in each case, the g-factor agrees with the limiting value for a pure rotational state.