Accurate calculation of dynamic Stark shifts and depopulation rates of Rydberg energy levels induced by blackbody radiation. Hydrogen, helium, and alkali-metal atoms

Quasiclassical calculations of blackbody-radiation-induced depopulation rates and effective lifetimes of RydbergnS,nP, andnБетеров1, Ryabtsev2, Tretyakov3 et al. 2009Phys. Rev. A378122512View full textAdd to dashboardCite

“…The Hartree-Fock and multiconfiguration-interaction methods require long calculation time. The Coulomb approximation method was applied by Farley and Wing [4] and Spencer et al [6] for numerical calculations and provided good agreement with experimental results. Theodosiou [8] and He et al [9] used a method of model potential with different atomic potential functions.…”

“…Later on it has been shown that interaction of Rydberg atoms with blackbody radiation (BBR) strongly affects the measured lifetimes [2]. BBR-induced depopulation rates were estimated by Cooke and Gallagher [3] for sodium Rydberg states with n=18 and 19, and accurately calculated by Farley and Wing [4] for alkalimetal nS, nP, and nD Rydberg atoms with n ≤ 30 using Coulomb approximation [5]. Radiative lifetimes of sodium nS and nD Rydberg states with 17≤n≤28 were measured by Spencer et al [6] in a cooled environment in order to reduce the influence of BBR.…”

“…For determination of effective lifetimes at 300 K and comparison with available experimental results, the authors of Ref. [9] used the data of Farley and Wing [4]. Galvez et al [10,11] investigated the cascade of BBR-induced transitions from the initially populated n=24-29 states of Na, both theoretically and experimentally.…”

“…Effective lifetimes and BBR-induced depopulation rates for these states have not been calculated yet, to the best of our knowledge. Commonly used results of [4] and [8] were limited by n=21 and n=30 respectively. We note that experiments with cold Rydberg atoms are usually performed at a room temperature of 300 K, when depopulation of Rydberg states by blackbody radiation is the main source of the reduction in radiative lifetimes as it was shown by Gallagher and Cooke [2].…”

Black-body radiation shifts and theoretical contributions to atomic clock research

“…induces a nonresonant perturbation of atomic transitions at room temperature [22], [23]. The average electric field radiated by a blackbody at temperature T is…”