Statistical and dynamic intensities of atomic spectral lines in plasma

Based on the quasi-classical approach, we solve the problem of a radiative cascade between Rydberg states in the space of parabolic quantum numbers that correspond to atom (or ion) quantization in a plasma microfield. We consider the level population source associated with the dielectronic recombination of electrons on ions with the cores in an external electric field. We determine the populations of states and the intensities of transitions between levels with a small change in principal quantum number. These “dynamic” intensities are compared with the “ statistical” intensities that correspond to an equidistribution in Stark sublevels. An appreciable discrepancy was found between the two types of intensities in plasma of low density that corresponds to the dominance of radiative transitions over collisional transitions.