氦原子三重态的高阶反冲修正
Higher-order recoil corrections for triplet states of the helium atom
摘要：
计算了氦原子最低三重态的$α^6\,m^2/M$级核反冲修正。改进了对$2^3S-2^3P$跃迁能同位素位移的理论预测，并对${}^3\textrm{He}-{}^4\textrm{He}$核电荷半径差的测定产生影响。这个计算是一个步骤，朝着直接确定的氦核的电荷半径的光谱测量。
英文摘要：
Nuclear recoil corrections of order $α^6\,m^2/M$ are calculated for the lowest-lying triplet states of the helium atom. It improves the theoretical prediction for the isotope shift of the $2^3S-2^3P$ transition energy and influences the determination of the ${}^3\textrm{He}-{}^4\textrm{He}$ nuclear charge radii difference. This calculation is a step forward on the way towards the direct determination of the charge radius of the helium nucleus from spectroscopic measurements.
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