论文标题
QED计算的氦气状离子的能量水平，$ 5 \ leq Z \ leq 30 $
QED calculations of energy levels of helium-like ions with $5 \leq Z \leq 30$
论文作者
论文摘要
在核结合强度参数$Zα$中，对地面上的所有顺序进行了两电子QED效应的计算，并为地面介绍了$ n = 2 $ hip的氦气样离子。从全阶结果中减去$Zα$扩展的第一项后，我们确定了$Mα^7 $及更高阶的高阶QED效应。将高阶剩余与结果结合到[V. A. Yerokhin和K. Pachucki，物理。 Rev. A 81，022507（2010）]，我们获得了地面和非混合$ n = 2 $ n = 2 $ helium like离子状态的最准确的理论预测，$ z = 5-30 $。对于混合$ 2^1 p_1 $和$ 2^3 p_1 $状态，我们通过评估高阶混合校正来扩展先前的计算，并表明它定义了$ z> 10 $的$ LS $耦合中理论计算的不确定性。
A calculation of two-electron QED effects to all orders in the nuclear binding strength parameter $Zα$ is presented for the ground and $n = 2$ excited states of helium-like ions. After subtracting the first terms of the $Zα$ expansion from the all-order results, we identify the higher-order QED effects of order $mα^7$ and higher. Combining the higher-order remainder with the results complete through order $mα^6$ from [V. A. Yerokhin and K. Pachucki, Phys. Rev. A 81, 022507 (2010)], we obtain the most accurate theoretical predictions for the ground and non-mixing $n=2$ states of helium-like ions with $Z = 5-30$. For the mixing $2^1 P_1$ and $2^3 P_1$ states, we extend the previous calculation by evaluating the higher-order mixing correction and show that it defines the uncertainty of theoretical calculations in the $LS$ coupling for $Z > 10$.
