The finite nuclear size correction to the bound-electron g factor in hydrogenlike atoms is investigated in the range Z=1-20. An analytical formula for this correction which includes the non-relativistic and dominant relativistic contributions is derived. In the case of the 1s state, the results obtained by this formula are compared with previous non-relativistic analytical and relativistic numerical calculations.
Nuclear-size correction to the one-loop self-energy in hydrogenlike ions
Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences(中国科学院精密测量科学与技术创新院);University of Chinese Academy of Sciences(中国科学院大学);Department of Physics, St. Petersburg State University(圣彼得堡国立大学物理系)
Magnetizability of the relativistic hydrogenlike atom in an arbitrary discrete energy eigenstate: Application of the Sturmian expansion of the generalized Dirac-Coulomb Green function
广义Dirac-Coulomb Green函数[R. Szmytkowski,J.物理学\ B \textbf{30},825(1997); \textbf{30},2747(E)(1997)]导出了相对论性单电子原子在任意离散态下的磁化率的封闭表达式,原子核为点状、无自旋、静止的荷电核$Ze$ .结果具有涉及单位辐角的广义超几何函数${}_3F_2$的双重有限和的形式。我们的一般表达式与其他作者对原子某些特殊状态用解析方法得到的公式一致。我们还提出了一些选定的类氢离子与$1 \leqslant Z \leqslant 137$激发态的磁化率的数值,并与文献中的数据进行比较。
Closed-form expression for the magnetic shielding constant of the relativistic hydrogenlike atom in an arbitrary discrete energy eigenstate: Application of the Sturmian expansion of the generalized Dirac-Coulomb Green function
给出了处于任意离散能量本征态的狄拉克单电子原子的偶极磁屏蔽常数的解析表达式。假设扰动原子态的外部磁场是弱的、均匀的、与时间无关的。关于原子核,我们假定它是点状的、无自旋的、不动的,并且带有电荷Ze。计算是基于广义狄拉克-库仑格林函数的Sturmian展开[R. Szmytkowski,J. Phys. B 30,825(1997); erratum 30,2747(1997)],结合超几何函数理论。最后的结果是一个初等形式,并同意相应的公式,以前得到的其他作者对某些特定的状态的原子。
In this paper we study the influence of electron screening on the Bohr-Weisskopf (BW) effect in many-electron atoms. The BW effect gives the finite-nucleus magnetization contribution to the hyperfine structure. Relativistic atomic many-body calculations are performed for s and p_1/2 states of several systems of interest for studies of atomic parity violation and time-reversal-violating electric dipole moments -- Rb, Cs, Fr, Ba+, Ra+, and Tl. For s states, electron screening effects are small, and the relative BW correction for hydrogenlike ions and neutral atoms is approximately the same. We r…
Magnetic-field-induced electric quadrupole moments for relativistic hydrogenlike atoms: Application of the Sturmian expansion of the generalized Dirac-Coulomb Green function
Finite-nuclear-size effect for hydrogenlike ions under high external pressure
College of Physics, Jilin University(吉林大学物理学院);Institute of Theoretical Physics, Chinese Academy of Sciences(中国科学院理论物理研究所);Institute of Applied Physics and Computational Mathematics(应用物理与计算数学研究所);Department of Nuclear Engineering and Management, Graduate School of Engineering, The University of Tokyo(东京大学工学研究科核工程与管理系);Department of Physics, Graduate School of Science, The University of Tokyo(东京大学理学研究科物理系);RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS)(理化学研究所跨学科理论与数学科学中心)
Extraction of the electron mass from $g$ factor measurements on light hydrogenlike ions
从潘宁陷阱测量与$^{12}$ C $^{5+}$离子和从理论结果的束缚电子$g$因素的电子质量的测定进行了详细描述。一些最近计算的贡献稍微移动提取的质量值。从实验和理论两方面讨论了进一步提高电子质量的前景。用$^4$ He $^+$离子进行的测量将使电子质量值的一致性检查成为可能,并且在将来改进$^4$ He核质量和确定精细结构常数。
Fully relativistic approach is applied to evaluation of the nuclear recoil effect on the bound-electron $g$ factor in hydrogenlike ions to first order in the electron-to-nucleus mass ratio $m/M$ and to all orders in $αZ$. The calculations are performed in the range $1 \leqslant Z \leqslant 20$ for the $g$ factors of $1s$, $2s$, $2p_{1/2}$, and $2p_{3/2}$ states. The $αZ$-dependence of the nontrivial QED recoil contribution as a function of $Z$ is studied.
NRQED approach to the fine and hyperfine structure corrections of order m$α$ 6 and m$α$ 6 (m/M)-Application to the hydrogen atom The NRQED approach is applied to the calculation of relativistic corrections to the fine and hyperfine structure of hydrogenlike atoms at orders m$α$ 6 and m$α$ 6 (m/M). Results are found to be in agreement with those of the relativistic theory. This confirms that the derived NRQED effective potentials are correct, and may be used for studying more complex atoms or molecules. Furthermore, we verify the equivalence between different forms of the NRQED Lagrangian used …
A model-operator approach to fully relativistic calculations of the nuclear recoil effect on energy levels in many-electron atomic systems is worked out. The one-electron part of the model operator for treating the normal mass shift beyond the Breit approximation is represented by a sum of semilocal and nonlocal potentials. The latter ones are constructed by employing the diagonal and off-diagonal matrix elements rigorously evaluated for hydrogenlike ions to first order in the electron-to-nucleus mass ratio. The specific mass shift beyond the lowest-order relativistic approximation has a form …
The shift of atomic energy levels due to hadronic vacuum polarization is evaluated in a semiempirical way for hydrogenlike ions and for muonic hydrogen. A parametric hadronic polarization function obtained from experimental cross sections of $e^-e^+$ annihilation into hadrons is applied to derive an effective relativistic Uehling potential. The energy corrections originating from hadronic vacuum polarization are calculated for low-lying levels using analytical Dirac-Coulomb wave functions, as well as bound wave functions accounting for the finite nuclear size. Closed formulas for the hadronic …
(Quasi)resonance electron-capture processes in non-symmetrical $(Z_{\rm P} \simeq 2Z_{\rm T})$ heavy ion-atom collisions are studied employing a semiclassical atomic Dirac-Fock-Sturm orbital coupled-channel approach within an independent-particle model. %A special attention has been paid to study a role of the relativistic effects. Systematic calculations of the electron-capture cross sections of the target $K$-shell electrons to the $L$ subshells of the projectile have been carried out for the collisions of bare thorium $(Z_{\rm P}=90)$ and zinc $(Z_{\rm P}=30)$ nuclei with hydrogenlike ions …