Abstract
The distribution of single-particle strength in was characterized with one-neutron knockout reactions from intermediate-energy secondary beams, selectively populating neutron-hole configurations at and 41, respectively. The spectroscopic strengths deduced from the measured partial cross sections to the individual final states, as tagged by their -ray decays, are used to identify and quantify neutron configurations in the wave functions. While compares well with shell-model predictions, the results for challenge the validity of current effective shell-model Hamiltonians by revealing discrepancies that cannot be explained so far. These results suggest that our understanding of the low-lying states in the neutron-rich, semimagic Ni isotopes may be incomplete and requires further investigation on both the experimental and theoretical sides.
4 More- Received 7 September 2016
DOI:https://doi.org/10.1103/PhysRevC.94.054324
©2016 American Physical Society