Lifetime measurement of the yrast 2$$^+$$ state in $$^{118}$$Te
Lifetime measurement of the yrast 2$$^+$$ state in $$^{118}$$Te
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$$^{118}$$Te 中 yrast 2$$^ $$ 状态的寿命测量
DOI：
10.1140/epja/s10050-023-01212-3
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
Cederlöf E
中科院分区：
文献类型：
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作者：
Cederlöf E
Te同位素中壳层（Sn闭合壳层上两个质子）的跃迁态的电磁跃迁概率对于理解这些同位素中的核集体以及中子-质子相互作用和交叉壳激发所起的作用具有重要意义。然而，由于中壳核118te的实验数据存在较大的不确定性，以及116te数据的缺失，使得很难确定跃迁概率随中子数变化的总体趋势。在这项工作中，测量了118te中稳态的寿命，目的是减少先前测量的不确定度。结果是isp。此外，状态的寿命被测量到beps。实验跃迁率是从测量的寿命中提取出来的，并与系统的大尺度壳模型计算结果进行了比较。中壳区数值的变化趋势与计算结果吻合较好，计算结果证明118te是一个接近完美的谐波振子。
The electromagnetic transition probabilities of the yraststates in the midshell Te isotopes, two protons above the closed shell at Sn, are of great importance for the understanding of nuclear collectivity in these isotopes and the role played by the neutron-proton interactions and cross-shell excitations. However, the large uncertainty of the experimental data for the midshell nucleus118Te and the missing data for116Te make it difficult to pin down the general trend of the evolution of transition probabilities as a function of the neutron number. In this work, the lifetime of the yraststate in118Te was measured, with the aim of reducing the uncertainty of the previous measurement. The result isps. In addition, the lifetime of thestate was measured to beps. The experimental transition rates are extracted from the measured lifetimes and compared with systematic large-scale shell-model calculations. The trend of thevalues in the midshell area is in good agreement with the calculations and the calculatedratio provide evidence for118Te as a near perfect harmonic vibrator.