Nonresonant Effects in One- and Two-Photon Transitions
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.
U. D. Jentschura and P. J. Mohr, "Nonresonant Effects in One- and Two-Photon Transitions," Canadian Journal of Physics, vol. 80, no. 6, pp. 633-644, National Research Council of Canada, Jun 2002.
The definitive version is available at http://dx.doi.org/10.1139/p02-019
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© 2002 National Research Council of Canada, All rights reserved.