【目的】研究A≈160质量区奇A核高激发态的形状演化性质。【方法】基于来自 National Nuclear Data Center的实验数据，采用修正后的 E-Gamma Over Spin（E-GOS）曲线方法首次系统性地探讨了A≈160质量区奇A核处于高激发态的激发特性。...【目的】研究A≈160质量区奇A核高激发态的形状演化性质。【方法】基于来自 National Nuclear Data Center的实验数据，采用修正后的 E-Gamma Over Spin（E-GOS）曲线方法首次系统性地探讨了A≈160质量区奇A核处于高激发态的激发特性。【结果】提取得到的E-GOS曲线表明该质量区原子核的形变与未配对中子的组态密切相关，当核外价中子占据高j 轨道时，随着角动量的增加将对核芯产生强大的形状驱动效应。此外，根据E-GOS曲线的变化特征，发现在 Yb同位素的高自旋能级结构中存在明显的形状演化现象，即随着角动量的增加原子核的激发机制从振动逐渐演化为转动。【结论】在A≈160质量区奇A核中系统性地存在形状演化现象。展开更多
Gamma rays with energies between 80keV and 1500keV produced by 133Ba and 152Eu standard sources are measured with the clover detector.Relative efficiencies and add-back factors are determined in both crystals and full...Gamma rays with energies between 80keV and 1500keV produced by 133Ba and 152Eu standard sources are measured with the clover detector.Relative efficiencies and add-back factors are determined in both crystals and full clover modes.The add-back characteristics have been calculated using Monte-Carlo simulation code Geant4.The simulation and measurements agree very well.展开更多
The high-spin level structure of 186 Au is re-investigated by means of in-beam γ-ray spectroscopy via the 172 Yb(19 F,5nγ )186 Au reaction.The oblate bands previously reported are revised and extended to higher-spin...The high-spin level structure of 186 Au is re-investigated by means of in-beam γ-ray spectroscopy via the 172 Yb(19 F,5nγ )186 Au reaction.The oblate bands previously reported are revised and extended to higher-spin states.A new Iπ =(20+) excited state has been identified and assigned to the πh-111/2 (×) vi-213/2h-19/2 configuration.The total Routhian surface and cranked shell model calculations suggest that the πh-111/2 (×) vi-213/2h-19/2 band in 186Au has a non-axial deformation.展开更多
文摘【目的】研究A≈160质量区奇A核高激发态的形状演化性质。【方法】基于来自 National Nuclear Data Center的实验数据，采用修正后的 E-Gamma Over Spin（E-GOS）曲线方法首次系统性地探讨了A≈160质量区奇A核处于高激发态的激发特性。【结果】提取得到的E-GOS曲线表明该质量区原子核的形变与未配对中子的组态密切相关，当核外价中子占据高j 轨道时，随着角动量的增加将对核芯产生强大的形状驱动效应。此外，根据E-GOS曲线的变化特征，发现在 Yb同位素的高自旋能级结构中存在明显的形状演化现象，即随着角动量的增加原子核的激发机制从振动逐渐演化为转动。【结论】在A≈160质量区奇A核中系统性地存在形状演化现象。
基金Supported by the National Natural Science Foundation of China under Grant Nos 10825522 and 11175217the Chinese Academy of Sciences。
文摘Gamma rays with energies between 80keV and 1500keV produced by 133Ba and 152Eu standard sources are measured with the clover detector.Relative efficiencies and add-back factors are determined in both crystals and full clover modes.The add-back characteristics have been calculated using Monte-Carlo simulation code Geant4.The simulation and measurements agree very well.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10905075,10825522,10735010,and 10975006the National Basic Research Program of China under Grant No 2007CB815005the Chinese Academy of Sciences.
文摘The high-spin level structure of 186 Au is re-investigated by means of in-beam γ-ray spectroscopy via the 172 Yb(19 F,5nγ )186 Au reaction.The oblate bands previously reported are revised and extended to higher-spin states.A new Iπ =(20+) excited state has been identified and assigned to the πh-111/2 (×) vi-213/2h-19/2 configuration.The total Routhian surface and cranked shell model calculations suggest that the πh-111/2 (×) vi-213/2h-19/2 band in 186Au has a non-axial deformation.
基金National Natural Science Foundation of China(11505035,11465005,11505056,11605054,11675266,U1732138,11775057,11765004,11565008)Natural Science Foundation of Guangxi,China(2017GXNSFAA198160,2015GXNSFDA139004)Project of Innovative Team and Distinguished Scholar in Institutions of Higher Education of Guangxi,China~~
