Newby Shifts in Odd-Odd Transitional Nuclei at A ~ 190

Abstract: Newby shifts in K = 0 bands of ^186,188Re and ^190,192,194Ir have been studied. The empirical Newby shift energies of ^186,188Re and ¹⁹²Ir have been used to derive parameter values of the finite-range central V_np residual interaction potential including both the short, and the long range central forces with core polarization, as well as the tensor interaction terms. It has been found that the short-range space-exchange Heizenberg interaction strength is the most essential parameter in order to reproduce experimental values of Newby shifts in A ~ 190 region odd-odd nuclei. Strong dependence on tensor interaction term strengths has been observed as well.