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High-spin states in Al-29 and Mg-27

机译：AL-29和MG-27中的高旋转状态

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The structure of Al-29 and Mg-27 was investigated using the reactions O-18(C-14, p2n) and O-18(C-14, alpha n) at 40 MeV. The charged particles were detected and identified with a Delta E-E telescope in coincidence with. radiation detected in the Florida State University Compton suppressed. detector array. The level and decay schemes of both nuclei have been expanded at higher spins and excitation energies. The positive-parity states up to 3.5-4.5 MeV agree well with shell model calculations using the USDA interaction. The negative-parity states in Mg-27 are reproduced relatively well by one-particle-one-hole calculations with the WBP-a interaction. Three Mg-27 states unbound by 0.4-1.4 MeV to neutron decay were observed to decay radiatively. One of these states had been previously observed to. decay in a (d, p gamma) experiment along with a surprising 16 other neutron unbound states. The competition between neutron and gamma decay in these states is discussed in terms of angular momentum barriers and spectroscopic factors.
机译：使用40mEV的反应O-18（C-14，P2N）和O-18（C-14，αN）研究Al-29和Mg-27的结构。检测到带电粒子并用达达电子望远镜的巧合鉴定。在佛罗里达州立大学康普顿检测到辐射。探测器阵列。两种核的水平和衰减方案已经在较高的旋转和激发能力下扩展。使用USDA交互，正奇偶校验高达3.5-4.5 MEV与Shell模型计算吻合良好。 MG-27中的负奇偶校验态由WBP-A相互作用的单粒子单孔计算相对较好地再现。观察到三个Mg-27态解除0.4-1.4 mev的中子衰变，腐烂衰减。以前观察到这些国家之一。在（d，p伽玛）实验中的衰减以及令人惊讶的16个其他中子未绑定状态。在角动量障碍和光谱因素方面讨论了这些国家中子和伽马衰减之间的竞争。

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