Thermal ionization of Cs Rydberg states |
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Authors: | I.L. Glukhov V.D. Ovsiannikov |
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Affiliation: | Department of Physics, Voronezh State University, University Square 1, Voronezh 394006, Russian Federation |
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Abstract: | Rates Pnl of photoionization from Rydberg ns-, np-, nd-states of a valence electron in Cs, induced by black-body radiation, were calculated on the basis of the modified Fues model potential method. The numerical data were approximated with a three-term expression which reproduces in a simple analytical form the dependence of Pnl on the ambient temperature T and on the principal quantum number n. The comparison between approximate and exactly calculated values of the thermal ionization rate demonstrates the applicability of the proposed approximation for highly excited states with n from 20 to 100 in a wide temperature range of T from 100 to 10,000 K. We present coefficients of this approximation for the s-, p- and d-series of Rydberg states. |
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Keywords: | 32.80.Fb 44.40.+a |
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