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

Abstract

The collisional shift of a transition constitutes an important systematic effect in high-precision spectroscopy. Accurate values for van der Waalsinteraction coefficients are required in order to evaluate the distance-dependent frequency shift. We here consider the interaction of excited hydrogen 6P atoms with metastable atoms (in the 2S state), in order to explore the influence of quasi-degenerate 2P, and 6S 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.

arXiv comment13 pages; RevTeX; accepted for publication in the journal "Atoms" (special issue on high-precision spectroscopy)

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Cited by in corpus (4)

• Sub-part-per-trillion test of the Standard Model with atomic hydrogen
• Quantum Electrodynamics of Dicke States: Resonant One-Photon Exchange and Entangled Decay Rate
• Pressure Shifts in High-Precision Hydrogen Spectroscopy: II. Impact Approximation and Monte-Carlo Simulations
• Pressure Shifts in High-Precision Hydrogen Spectroscopy: I. Long-Range Atom-Atom and Atom-Molecule Interactions