Long-Range Interactions for Hydrogen: 6P–1S and 6P–2S Systems

Atoms

Ulrich D. Jentschura¹  Chandra M. Adhikari¹ 

[1] Department of Physics, Missouri University of Science and Technology, Rolla, MO 65409, USA;

关键词: long-range interactions;    quasi-degenerate states;    hyperfine levels;    matrix element;    interatomic interactions;   

DOI  :  10.3390/atoms5040048

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown