Abstract

A universal representation of Rydberg atom line shapes in plasmas is obtained. It bases on analytical formulas for intensity distribution in radiation transitions n→n′ between highly excited atomic states with large values of principle quantum numbers n, n′≫1, Δn=n−n′≪n and the frequency fluctuation model (FFM) for account of ion thermal motion effects. The line shapes are presented in a universal manner as functions of plasma temperatures and densities.

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