High-spin states in the N = 128 nucleus 218 Th have been investigated following fusion–evaporation reactions, using the recoil-decay tagging technique. Due to the short-lived nature of the ground state of 218 Th prompt γ rays have been correlated with the α decay of the daughter nucleus 214 Ra. The level scheme representing the decay of excited states has been extended to (16 + ) with the observation of six previously unreported transitions. The observations are compared with the results of shell model calculations and within the context of the systematics of neighbouring nuclei.

中文翻译：

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218 Th的高旋转状态

N–128核218 Th中的高自旋态已通过反冲衰变标记技术在聚变蒸发反应之后进行了研究。由于218 Th基态的短暂性，已经使迅速的γ射线与子核214 Ra的α衰变相关。观察到六个以前未报告的跃迁，表示激发态衰减的能级方案已扩展到（16 +）。将观测结果与壳模型计算的结果进行比较，并在相邻核的系统学范围内进行比较。