The Broadening of the Lyman Lines in a Laser-Produced Plasma
Spectra emitted by laser produced plasmas of light elements when observed with spatial resolution show the H-Iike Lyman lines strongly broadened and asymmetrically self-absorbed especially near the target. The case of Lα, Lβ and Lγ lines of B V is analysed in detail. Temperature, density and plasma dimensions have been spectroscopically determined. A model for the emitting plasma, that takes into account Stark and Doppler broadening, motion Doppler shift and optical opacity, has been devised that succesfully explains the observed profiles. Diagnostic possibilities are outlined.
KeywordsOptical Depth Compute Profile Ground State Population Lyman Line Geometrical Depth
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- 4.G. Tondello, E. Jannitti and A.M. Malvezzi, Phys. Rev. A to be published (1977).Google Scholar
- 7.R.J. Speer, J. Spectrosc. Soc. (Japan) 23 Suppl. 1, 53 (1974).Google Scholar
- 11.H.R. Griem, Spectral Line Broadening by Plasmas (Academic Press, New York, 1974).Google Scholar
- 12.A.M. Malvezzi, Rapporto CISE (1977).Google Scholar
- 13.H.E. White, Introduction to Atomic Spectra (Mc Graw-Hill, New York, 1934).Google Scholar
- 14.R.W.P. Mc Whirter, Plasma Diagnostic Techniques ed. R.H. Huddlestone and S.L. Leonard (Academic Press, New York, 1965) p. 201.Google Scholar