Survey of excited state neutron spectroscopic factors for Z=8-28 nuclei

Details Survey of excited state neutron spectroscopic factors for Z=8-28 nuclei Survey of excited state neutron spectroscopic factors for Z=8-28 nuclei

2008-10-10

arxiv.org/abs/0810.1925v2

Phys.Rev.Lett.102:062501,2009

Physics

Nuclear Physics

Nuclear Experiment

11 pages, 3 figures, 1 table. accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.102.062501

We have extracted 565 neutron spectroscopic factors of sd and fp shell nuclei by systematically analyzing more than 2000 measured (d,p) angular distributions. We are able to compare 125 of the extracted spectroscopic factors to values predicted by large-basis shell-model calculations and evaluate the accuracies of spectroscopic factors predicted by different shell-model interactions in these regions. We find that the spectroscopic factors predicted for most excited states of sd-shell nuclei using the latest USDB or USDA interactions agree with the experimental values. For fp shell nuclei, the inability of the current models to account for the core excitation and fragmentation of the states leads to considerable discrepancies. In particular, the agreement between data and shell-model predictions for Ni isotopes is not better than a factor of two using either the GXPF1A or the XT interaction.

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