Structure of Xe 126 , 128 studied in Coulomb excitation measurements
Structure of Xe 126 , 128 studied in Coulomb excitation measurements
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库仑激发测量中研究的 Xe 126 、 128 结构
DOI：
10.1103/physrevc.106.034311
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发表时间：
2022
影响因子：
3.1
通讯作者：
Kisyov S
中科院分区：
文献类型：
--
作者：
Kisyov S
在密歇根州立大学（MSU）的国家超导回旋加速器实验室ReA3再加速器设施上进行了亚势垒库仑激发测量，研究了其电磁特性。和原子核分别被加速到3.74和3.81 MeV/核子，并撞击到两个目标上。在使用JANUS装置的情况下，检测到与散射核相吻合的对低洼状态进行抑制的射线。利用gosia1和gosia2代码从实验数据中提取低洼状态和过渡的过渡和对角矩阵元素。采用微壳模型和davydov - filippov -刚性转子模型将实验结果与理论计算结果进行了比较。基于先进的Hartree-Fock Bogoliubov + generator坐标法（HFBgcm）建立的大模型空间壳层模型（称为PMMU模型）的计算结果与两个原子核的测量结果吻合较好，除了第二态。对实验确定的这种状态几乎消失的电四极矩的解释仍然是一个理论挑战。
The electromagnetic properties ofwere studied in subbarrier Coulomb excitation measurements performed at the National Superconducting Cyclotron Laboratory Re-accelerator facility, ReA3, at Michigan State University (MSU).andnuclei were accelerated to 3.74 and 3.81 MeV/nucleon, respectively, and were impinged onandtargets. Therays deexciting the populated low-lying states were detected in coincidence with the scattered nuclei using the JANUS setup. Transition and diagonal matrix elements for low-lying states and transitions inwere extracted from the experimental data using thegosiaandgosia2codes. The experimental results were compared with the theoretical calculations by the microscopic shell model and the Davydov-Filippov-rigid rotor model. The calculated results from the newly established shell model (called the PMMU model), which is based on the advanced Hartree-Fock Bogoliubov plus generator coordinate method (HFBgcm) for a large model space, agree well with the measurements in both nuclei, except for the secondstate. Interpretation for the experimentally determined nearly vanishing electric-quadrupole moment of this state remains a challenge for theory.