Spectroscopy of neutron-unbound $^{27,28}$F

Details Spectroscopy of neutron-unbound $^{27,28}$F Spectroscopy of neutron-unbound $^{27,28}$F

2012-03-07

arxiv.org/abs/1203.1369v1

Physics

Nuclear Physics

Nuclear Experiment

10 pages, 11 figures, Accepted for publication in Phys. Rev. C

Scientific paper

The ground state of $^{28}$F has been observed as an unbound resonance $2\underline{2}0$ keV above the ground state of $^{27}$F. Comparison of this result with USDA/USDB shell model predictions leads to the conclusion that the $^{28}$F ground state is primarily dominated by $sd$-shell configurations. Here we present a detailed report on the experiment in which the ground state resonance of $^{28}$F was first observed. Additionally, we report the first observation of a neutron-unbound excited state in $^{27}$F at an excitation energy of $25\underline{0}0 (2\underline{2}0)$ keV.

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