Radiative continua of noble gas plasmas.

Computer Science

Scientific paper

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Plasma: Continuum Radiation, Plasma: Radiative Transfer, Plasma: Noble Gases

Scientific paper

A simple completely analytical method for the calculation of the plasma radiation continuum in the visible and neighbouring regions is derived. It is based on the semi-classical quantum defect theory. In spite of the simplicity the accuracy of the method is found to be comparable with those of Schlüter and Hofsaess calculations, but its main advantage is the reasonable description of the plasma density (weak coupling) effects in the near-threshold region. Thus, the authors' calculation does not show the sharp threshold of the photoionization continuum and a correct comparison with experiment in the whole wavelength range under consideration can be made. A good agreement with experimental data on the continuous radiation of neon, argon, krypton and xenon plasmas is found. The calculation scheme presented may be useful for moderately dense plasma diagnostics and looks as reasonable basis for incorporation of strong coupling effects.

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