Long-Range Interactions for Hydrogen: 6P–1S and 6P–2S Systems
Long-Range Interactions for Hydrogen: 6P–1S and 6P–2S Systems
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DOI：
10.3390/atoms5040048
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发表时间：
2017-11
期刊：
影响因子：
1.8
通讯作者：
U. Jentschura;C. Adhikari
中科院分区：
文献类型：
--
作者：
U. Jentschura;C. Adhikari
跃迁的碰撞位移是高精度光谱学中一个重要的系统效应。为了评估与距离相关的频移，需要范德瓦尔斯相互作用系数的精确值。本文考虑激发态氢原子6p原子与亚稳原子（2s态）的相互作用，以探讨准简并2p和6s态对偶极子-偶极子相互作用的影响。计算的动机是由计划的高精度跃迁测量给出的。由于准简并能级的存在，人们可以在宽距离范围内对相互作用项使用非延迟逼近。
The collisional shift of a transition constitutes an important systematic effect in high-precision spectroscopy. Accurate values for van der Waals interaction coefficients are required in order to evaluate the distance-dependent frequency shift. We here consider the interaction of excited hydrogen 6 P atoms with metastable atoms (in the 2 S state), in order to explore the influence of quasi-degenerate 2 P and 6 S states on the dipole-dipole interaction. The motivation for the calculation is given by planned high-precision measurements of the transition. Due to the presence of quasi-degenerate levels, one can use the non-retarded approximation for the interaction terms over wide distance ranges.