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1991

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Reviews of topical problems


Distribution of the radiative lifetimes over the excited states of atoms and ions

The empirical regularities in the variation of the radiative lifetimes $\tau_k$ of excited states of atoms are reviewed. A quasiclassical theory of radiation damping processes is constructed. The formalism of quantization of the natural width $A_k=\tau_k^{-1}$ of the excited states of atoms and ions is presented. The question of how to describe the serial dependences for a perturbed series is investigated. It is demonstrated that the radiation emission of atomic systems is sharply reduced when the classical factors in the radiative processes are suppressed. Schemes are proposed for extrapolating lifetimes from the lower terms of a series to the upper Rydberg states, right up to the continuum. Recommended values of $\tau_k$ for group I, II, and VIII atoms are given in a form that is convenient for inclusion in a computerized data base.

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Fulltext is also available at DOI: 10.1070/PU1991v034n01ABEH002331
PACS: 32.70.Cs, 31.15.−p (all)
DOI: 10.1070/PU1991v034n01ABEH002331
URL: https://ufn.ru/en/articles/1991/1/a/
Citation: Bezuglov N N, Borisov E N, Verolainen Ya F "Distribution of the radiative lifetimes over the excited states of atoms and ions" Sov. Phys. Usp. 34 (1) 1–15 (1991)
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Оригинал: Безуглов Н Н, Борисов Е Н, Веролайнен Я Ф «Распределение радиационных времен жизни по возбужденным состояниям атомов и ионов» УФН 161 (1) 3–29 (1991); DOI: 10.3367/UFNr.0161.199101a.0003

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