Research output: Contribution to journal › Article › peer-review
Two-photon atomic level widths at finite temperatures. / Zalialiutdinov, T.; Anikin, A.; Solovyev, D.
In: Physical Review A, Vol. 102, No. 3, 032204, 09.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Two-photon atomic level widths at finite temperatures
AU - Zalialiutdinov, T.
AU - Anikin, A.
AU - Solovyev, D.
N1 - Publisher Copyright: © 2020 American Physical Society.
PY - 2020/9
Y1 - 2020/9
N2 - The thermal two-photon level broadening of the excited energy levels in the hydrogen and H-like helium is evaluated via the imaginary part of thermal two-loop self-energy correction for bound electrons. All the derivations are presented in the framework of rigorous quantum electrodynamic theory at finite temperatures and are applicable for the H-like ions. On this basis, we found a contribution to the level broadening induced by the blackbody radiation which is fundamentally different from the usual line broadening caused by the stimulated two-photon decay and the Raman scattering of thermal photons. Numerical calculations of the two-loop thermal correction to the two-photon width for the 2s state in hydrogen and singly ionized helium atoms show that the effect could significantly exceed the higher-order relativistic and radiative QED corrections commonly included in the calculations. In addition, the thermal two-loop self-energy correction significantly exceeds the "ordinary"stimulated one-photon depopulation rate at the relevant laboratory temperatures. In this work, detailed analysis and the corresponding comparison of the effect with the existing laboratory measurements in H-like ions are carried out.
AB - The thermal two-photon level broadening of the excited energy levels in the hydrogen and H-like helium is evaluated via the imaginary part of thermal two-loop self-energy correction for bound electrons. All the derivations are presented in the framework of rigorous quantum electrodynamic theory at finite temperatures and are applicable for the H-like ions. On this basis, we found a contribution to the level broadening induced by the blackbody radiation which is fundamentally different from the usual line broadening caused by the stimulated two-photon decay and the Raman scattering of thermal photons. Numerical calculations of the two-loop thermal correction to the two-photon width for the 2s state in hydrogen and singly ionized helium atoms show that the effect could significantly exceed the higher-order relativistic and radiative QED corrections commonly included in the calculations. In addition, the thermal two-loop self-energy correction significantly exceeds the "ordinary"stimulated one-photon depopulation rate at the relevant laboratory temperatures. In this work, detailed analysis and the corresponding comparison of the effect with the existing laboratory measurements in H-like ions are carried out.
UR - http://www.scopus.com/inward/record.url?scp=85092426881&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.102.032204
DO - 10.1103/PhysRevA.102.032204
M3 - Article
AN - SCOPUS:85092426881
VL - 102
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 3
M1 - 032204
ER -
ID: 84993892