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Sensor Electronics and Microsystem Technologies

THERMAL PHOTOIONIZATION OF THE RYDBERG ATOMS BY THE BLACKBODY RADIATION: NEW RELATIVISTIC APPROACH

T. N. Zelentsova, T. B. Perelygina

Published Nov 24, 2009• 2 citations
Publisher

Abstract

Within the gauge-invariant quantum electrodynamics perturbation theory it is presented a new relativistic approach to definition of the thermal photoionization characteristics for the Rydberg atoms, in particular, the Rydberg atoms, ionized by the Blackbody radiation. Theory of corresponding phenomena in the Rydberg systems is a basis for creation of new class of the atomic sensors.

DOI
10.18524/1815-7459.2009.4.116037

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Within the gauge-invariant quantum electrodynamics perturbation theory it is presented a new relativistic approach to definition of the thermal photoionization characteristics for the Rydberg atoms, in particular, the Rydberg atoms, ionized by the Blackbody radiation. Theory of corresponding phenomena in the Rydberg systems is a basis for creation of new class of the atomic sensors.
The combined relativistic energy approach and relativistic many-body perturbation theory with the zeroth Dirac-Fock potential approximation are used for computing the thermal Blackbody radiation ionization characteristics of the alkali Rydberg atoms, in particular, the rubidium and caesium in Rydberg states with principal quantum number n = 20-100. Preliminary application of theory to computing ionization rate for the Rydberg sodium atom in the have demonstrated physically reasonable agreement between the theoretical and experimental data. The accuracy of the theoretical data is provided by a correctness of the corresponding relativistic wave functions and accounting for the exchange-correlation effects.
We present the results of studying the spectroscopic characteristics of heavy Rydberg atomic systems in a black-body (thermal) radiation field. As theoretical approach we apply the combined generalized relativistic energy approach and relativistic many-body perturbation theory with ab initio Dirac zeroth approximation. There are presented the calculational data for the thermal black-body radiation ionization characteristics of the alkali Rydberg atoms, in particular, the sodium in Rydberg states with principal quantum number n=10-100 and ytterbium ion. Application of theory to computing the spectral parameters of studied atomic systems have demonstrated physically reasonable agreement between the theoretical and experimental data. The accuracy of the theoretical data is provided by a correctness of the corresponding relativistic wave functions and accounting for the exchange-correlation effects.
The combined relativistic energy approach and relativistic many-body perturbation theory with the zeroth Dirac-Fock-Sham approximation are used for computing the thermal Blackbody radiation ionization characteristics of the alkali Rydberg atoms, in particular, the sodium in Rydberg states with principal quantum number n=10-100. The detailed analysis of the data of computing ionization rates for the Rydberg sodium atom demonstrates physically reasonable agreement between the theoretical and experimental data. The accuracy of the theoretical data is provided by a correctness of the corresponding relativistic wave functions and accounting for the exchange-correlation effects.