标题： 中子不束缚的$^{27,28}$F 的光谱学 显示英文标题

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

摘要： $^{28}$F 的基态已被观察到为一个未结合的共振态，位于$^{27}$F 基态以上$2\underline{2}0$keV 处。将此结果与 USDA/USDB 壳模型预测进行比较得出结论，$^{28}$F 的基态主要由$sd$-壳构型主导。在此我们提供对实验的详细报告，该实验首次观察到了$^{28}$F 的基态共振态。 此外，我们报告了在激发能为$25\underline{0}0 (2\underline{2}0)$keV 时，在$^{27}$F 中首次观察到一个不包含中子的激发态。 显示英文摘要

摘要： 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.