旋转模型中$^{25}$ F的核心
The Core of $^{25}$F in the Rotational Model
摘要：
在RIBF/RIKEN最近进行的一项实验中，在270 MeV/A的逆运动学中研究了$^{25}$ F $(p,2p)$ $^{24}$ O反应。衍生的光谱因子表明，有效核心的$^{25}$ F显着不同的自由$^{24}$ O核。我们解释这些结果的粒子转子模型内，并表明，$^{25}$ F的实验水平计划可以理解的旋转对齐耦合计划，其$5/2^+_1$基态作为带头的去耦带。所观察到的$1/2_1^+$和$9/2_1^+$状态的激发能与有效核心的旋转能量密切相关，看到奇数质子，并允许我们估计其$2^+$能量在$\approx$ 3.2兆电子伏和一个温和的四极形变，$ε_2 \approx 0.15$。测量的碎裂的$πd_{5/2}$单粒子强度进行了讨论，并建议一些进一步的实验。
英文摘要：
In a recent experiment, carried out at RIBF/RIKEN, the $^{25}$F$(p,2p)$$^{24}$O reaction was studied at 270 MeV/A in inverse kinematics. Derived spectroscopic factors suggest that the effective core of $^{25}$F significantly differs from a free $^{24}$O nucleus. We interpret these results within the Particle-Rotor Model and show that the experimental level scheme of $^{25}$F can be understood in the rotation-aligned coupling scheme, with its $5/2^+_1$ ground state as the band-head of a decoupled band. The excitation energies of the observed $1/2_1^+$ and $9/2_1^+$ states correlate strongly with the rotational energy of the effective core, seen by the odd proton, and allow us to estimate its $2^+$ energy at $\approx$ 3.2 MeV and a moderate quadrupole deformation, $ε_2 \approx 0.15$. The measured fragmentation of the $πd_{5/2}$ single-particle strength is discussed and some further experiments suggested.
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