COMMENT

Reply to Comment on the proposed reduction of red shifts of the Balmer-α line in dense plasmas by the dipole ionic–electronic shift

Published 24 March 2003 Published under licence by IOP Publishing Ltd
, , Citation Eugene Oks 2003 J. Phys. B: At. Mol. Opt. Phys. 36 1459 DOI 10.1088/0953-4075/36/7/401

0953-4075/36/7/1459

Abstract

We point out questionable statements presented in the comment on our work given by Griem (2003 J. Phys. B: At. Mol. Opt. Phys. 36 1279). We emphasize that for the latest benchmark results obtained by Flih et al (2003 J. Phys. B: At. Mol. Opt. Phys. 36 283) using a flash tube plasma (carried out under the same temperature and density ranges as the laser-produced underwater plasma source experiment performed by Escarguel et al (2000 Phys. Rev. E 62 2667)) it was found that the experimental results were consistent with the Hα widths and shifts measured in laser-produced underwater plasma. In this latest experiment, the temperature and density were measured independently of the Hα lineshape/width/shift. Flih et al also found that their experimental widths and shifts of the Hα line were in good agreement with our theory of Stark widths and shifts, while comparison with the corresponding theory presented by Griem yielded significant discrepancies: up to a factor of two for the shifts—just as in the experiment by Escarguel et al. Our theory of Stark widths and shifts is based on our study of new coupling phenomena that become effective in relatively low-temperature dense plasmas (so-called 'warm-dense-matter' effects). We note that the experiments presented by Escarguel et al and Flih et al are much better suited to the purpose of verifying these new warm-dense-matter effects than gas-liner pinch experiments: in the latter the temperature was by one order of magnitude greater than in the experiments of Escarguel et al and Flih et al.

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10.1088/0953-4075/36/7/401