arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.02740physics.atom-phphysics.chem-phphysics.comp-ph
收藏

Cd $^{+}$的能量、超精细结构常数和偶极极化率的相对论耦合集团理论分析

Relativistic coupled-cluster theory analysis of energies, hyperfine structure constants, and dipole polarizabilities of Cd$^{+}$

Cheng-Bin Li, Yan-Mei Yu, B. K. Sahoo

摘要:

分析了电子相关效应在确定单电荷镉离子(Cd $^+$)低激发态的吸附能、磁偶极子超精细结构常数和电偶极子(E1)矩阵元中的作用.我们采用单、双近似相对论耦合团簇(RCC)方法计算这些性质。中间结果从Dirac-Hartree-Fock近似,二阶多体微扰理论和考虑只有线性项的RCC方法给出证明电子相关效应在该离子中的传播。重要的RCC条款的贡献也突出了各种相关效应在这些属性的评价的重要性。最后,我们用{ \it ab initio}方法计算了Cd $^+$的基态和$5p \ ^2P_{1/2;3/2}$态的E1极化率($α^{E1}$).我们通过替换一些E1矩阵元素和能量来重新估计它们,以减少它们的不确定性,以便它们可以用于该离子的高精度实验。

英文摘要:

Roles of electron correlation effects in the determination of attachment energies, magnetic dipole hyperfine structure constants and electric dipole (E1) matrix elements of the low-lying states in the singly charged cadmium ion (Cd$^+$) have been analyzed. We employ the singles and doubles approximated relativistic coupled-cluster (RCC) method to calculate these properties. Intermediate results from the Dirac-Hartree-Fock approximation, second-order many-body perturbation theory and considering only the linear terms of the RCC method are given to demonstrate propagation of electron correlation effects in this ion. Contributions from important RCC terms are also given to highlight importance of various correlation effects in the evaluation of these properties. At the end, we also determine E1 polarizabilities ($α^{E1}$) of the ground and $5p \ ^2P_{1/2;3/2}$ states of Cd$^+$ in the {\it ab initio} approach. We estimate them again by replacing some of the E1 matrix elements and energies from the measurements to reduce their uncertainties so that they can be used in the high precision experiments of this ion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑