The level structure of ${}^{25}\mathrm{Na}$ and ${}^{22}\mathrm{Ne}$ in the high excitation energy/high spin regime was studied using $\gamma$-ray spectroscopy and Doppler shift lifetime measurements following ${}^{12}\mathrm{C}({}^{18}\mathrm{O},\alpha p){}^{25}\mathrm{Na}$ and ${}^{12}\mathrm{C}({}^{18}\mathrm{O},2\alpha ){}^{22}\mathrm{Ne}$ reactions. Multiple new levels and transitions were identified in both nuclides based on $\gamma \text{−}\gamma$ coincidence data. In ${}^{25}\mathrm{Na}$, evidence was found for higher-spin negative-parity states up to $I^{\pi }=13/2^{-}$ resulting from neutron excitation into the $pf$ shell, in good agreement with shell model calculations using the SDPF-MU and FSU interactions. Candidates for the yrast $7^{+}$ and $8^{+}$ levels in ${}^{22}\mathrm{Ne}$, consistent with calculations using the USDB interaction, were also identified.

中文翻译：

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表壳核Na25和Ne22的高自旋结构

的层次结构 ${}^{25}娜$ 和 ${}^{22}\mathrm{NE}$ 在高激发能/高自旋状态下研究 $\gamma$射线光谱学和多普勒频移寿命测量 ${}^{12}\mathrm{C}（{}^{\mathrm{18岁}}\mathrm{Ø}，\alpha p）{}^{25}娜$ 和 ${}^{12}\mathrm{C}（{}^{\mathrm{18岁}}\mathrm{Ø}，2\alpha ）{}^{22}\mathrm{NE}$反应。两种核素都根据以下条件鉴定出多个新的水平和过渡$\gamma \text{-}\gamma$符合数据。在${}^{25}娜$，找到了最高自旋负校验状态的证据，直至 ${\mathrm{一世}}^{\pi }=13/2^{-}$ 由中子激发到 $pF$外壳，与使用SDPF-MU和FSU相互作用的外壳模型计算非常吻合。yrast的候选人$7^{+}$ 和 $8^{+}$ 水平 ${}^{22}\mathrm{NE}$还确定了与使用USDB交互进行的计算一致的结果。