Mixed target ground-state effects in single-nucleon transfer to odd-odd nuclei

The effect of a mixed target ground state is considered when populating states in an odd-odd nucleus via single-nucleon transfer. Expressions for the spectroscopic strength for stripping and pickup reactions have been derived assuming that the target is described by a combination of Nilsson orbitals and final states are mixed configurations. The mixing causes the transfer strength to be spread out over many levels and, even with moderate mixing amplitudes, states that would not normally be populated can get significant cross sections. The results of Nilsson calculations taking into account Coriolis mixing in both the target and final states are compared with single-nucleon transfer data to 190Ir. It was found for most levels that configuration mixing in the final state is more important than the effects of a mixed target ground state.