177 neutron spectroscopic factors for nickel isotopes have been extracted by performing a systematic analysis of the angular distributions measured from ($d,p$) transfer reactions. A subset of the extracted spectroscopic factors are compared to predictions of large-basis shell models in the full $\mathit{pf}$ model space using the GXPF1A effective interaction, and the $(f_{5/2},p_{3/2},p_{1/2},g_{9/2})$ model space using the JJ4PNA interaction. For ground states, the predicted spectroscopic factors using the GXPF1A effective interaction in the full $\mathit{pf}$ model space agree very well with the experimental values, while predictions based on several other effective interactions and model spaces are about 30% higher than the experimental values. For low-energy excited states ($<3.5$ MeV), the agreement between the extracted spectroscopic factors and shell model calculations is not better than a factor of two.

• Received 30 January 2009

DOI:https://doi.org/10.1103/PhysRevC.79.054611