paper

Nonresonant effects in one- and two-photon transitions

arXiv:physics/0110053 · doi:10.1139/p02-019

Abstract

We investigate nonresonant contributions to resonant Rayleigh scattering cross sections of atoms. The problematic nonresonant contributions set a limit to the accuracy to which atomic spectra determine energy levels. We discuss the off-resonance effects in one-photon transitions. We also show that off-resonance contributions for the 1S-2S two-photon transition in atomic hydrogen are negligible at current and projected levels of experimental accuracy. The possibility of a differential measurement for the detection of off-resonance effects in one-photon transitions in atomic hydrogen is discussed.

13 pages, LaTeX, 3 figures; submitted to Can. J. Phys. (Oct 2001); discussion of one-photon transitions enhanced

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