Energy levels of the $1sns$ and $1snp$ states of ions along the helium isoelectronic sequence from carbon to uranium are calculated, with $n=3$-$7$. The computation is performed within the relativistic configuration-interaction method, including the relativistic nuclear recoil effect, the leading QED effects, and the frequency dependence of the Breit interaction. All theoretical energies are supplied with uncertainty estimates.

中文翻译：

---

类氦离子 1sns 和 1snp 态的理论能级

沿着从碳到铀的氦等电子序列计算离子的 $1sns$ 和 $1snp$ 状态的能级，其中 $n=3$-$7$。计算是在相对论配置相互作用方法内执行的，包括相对论核反冲效应、领先的 QED 效应和 Breit 相互作用的频率依赖性。所有理论能量都提供了不确定性估计。