Two-photon atomic level widths at finite temperatures
作者： T. Zalialiutdinov , A. Anikin , D. Solovyev
DOI: 10.1103/PHYSREVA.102.032204
关键词: Ionization 、 Radiative transfer 、 Electron 、 Physics 、 Raman scattering 、 Atomic physics 、 Excited state 、 Helium 、 Black-body radiation 、 Photon
摘要: The thermal two-photon level broadening of the excited energy levels in hydrogen and H-like helium is evaluated via imaginary part two-loop self-energy correction for bound electrons. All derivations are presented framework rigorous quantum electrodynamic theory at finite temperatures applicable ions. On this basis, we found a contribution to induced by blackbody radiation which fundamentally different from usual line caused stimulated decay Raman scattering photons. Numerical calculations width $2s$ state singly ionized atoms show that effect could significantly exceed higher-order relativistic radiative QED corrections commonly included calculations. In addition, exceeds ``ordinary'' one-photon depopulation rate relevant laboratory temperatures. work, detailed analysis corresponding comparison with existing measurements ions carried out.
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