Isomers and high-spin structures in the N = 81 isotones 135Xe and 137Ba
Isomers and high-spin structures in the N = 81 isotones 135Xe and 137Ba
复制标题
N = 81 同位素 135Xe 和 137Ba 中的异构体和高自旋结构
DOI：
10.1103/physrevc.95.024316
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发表时间：
2017
影响因子：
3.1
通讯作者：
N. Yoshinaga,他（88名中10番目）
中科院分区：
文献类型：
--
作者：
A. Vogt;B. Birkenbach;P. Reiter;A. Blazhev;M. Siciliano;K. Hady´nska-Klek;J.J. Valiente-Dobon; C. Wheldon;E. Teruya;N. Yoshinaga,他（88名中10番目）
研究了多核转移（MNT）和融合蒸发反应后的高自旋结构和同分异构体。这两个原子核分别在(i)和（ii）使用高分辨率先进伽马跟踪阵列（AGATA）与PRISMA磁谱仪耦合的MNT反应中被填充，（iii）在使用伽马射线阵列（GAMMASPHERE）与气体探测器阵列CHICO相结合的MNT反应中被填充，（iv）通过与科隆大学的horus射线阵列的融合蒸发反应被填充。和的高自旋能级方案被大大扩展到更高的能量。2058-keVstate序列被确定为同分异构体，填补了沿同分异构体系统的空白。它的半衰期为9.0(9)ns，对应于w的跃迁概率降低。实验推导出的同分异构体态的简化跃迁概率与壳模型预测结果进行了比较。最新的壳模型计算总体上较好地再现了实验结果，并为新水平的解释提供了指导。
The high-spin structures and isomers of theisotonesandare investigated after multinucleon-transfer (MNT) and fusion-evaporation reactions. Both nuclei are populated (i) inand (ii)MNT reactions employing the high-resolution Advanced Gamma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA, (iii) in theMNT reaction employing the-ray array GAMMASPHERE in combination with the gas-detector array CHICO, and (iv) via afusion-evaporation reaction with the HORUS-ray array at the University of Cologne. The high-spin level schemesofandare considerably extended to higher energies. The 2058-keVstate inis identified as an isomer, closing a gap in the systematics along theisotones. Its half-life is measured to be 9.0(9) ns, corresponding to a reduced transition probability ofW.u. The experimentally deduced reduced transition probabilities of the isomeric states are compared to shell-model predictions. Latest shell-model calculations reproduce the experimental findings generally well and provide guidance to the interpretation of the new levels.