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- Title
Semiclassical theory of the radiative-collisional cascade in a Rydberg atom.
- Authors
Kadomtsev, M. B.; Levashova, M. G.; Lisitsa, V. S.
- Abstract
We have developed a two-dimensional semiclassical model of the radiative-collisional cascade for hydrogen-like systems. We describe the collisions with electrons and ions by classical diffusion in the space of principal and orbital quantum numbers and use an iterative procedure that consistently takes into account the quantum nature of the radiative cascade for radiative transitions. The model establishes the correspondence between the quantum and classical approaches and indicates that the latter cannot be directly used to calculate the population kinetics of highly excited atomic states. Our calculations of the two-dimensional populations of highly excited atomic hydrogen states for selective, three-body, and photorecombination sources of population allow the data of one-dimensional kinetic models to be refined. The calculated intensities of recombination lines demonstrate the degree of nonequilibrium of the Rydberg state populations under typical astrophysical plasma conditions.
- Subjects
ELECTRONS; PROPERTIES of matter; RADIATIVE transitions; SOLID solutions; NONEQUILIBRIUM thermodynamics
- Publication
Journal of Experimental & Theoretical Physics, 2008, Vol 106, Issue 4, p635
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/S106377610804002X