Charge-state distribution and Doppler effect in an expanding photoionized plasma.

M.E. Foord, R.F. Heeter, P.A.M. Van Hoof, R.S. Thoe, J.E. Bailey, M.E. Cuneo, H.-K. Chung, D.A. Liedahl, K.B. Fournier, G.A. Chandler, Valdas Jonauskas, Romas Kisielius, L.P. Mix, Catherine Ramsbottom, P.T. Springer, Francis Keenan, S.J. Rose, W.H. Goldstein

Research output: Contribution to journalArticlepeer-review

72 Citations (Scopus)

Abstract

The charge state distributions of Fe, Na, and F are determined in a photoionized laboratory plasma using high resolution x-ray spectroscopy. Independent measurements of the density and radiation flux indicate unprecedented values for the ionization parameter ���¾=20 25 erg cm s-1 under near steady-state conditions. Line opacities are well fitted by a curve-of-growth analysis which includes the effects of velocity gradients in a one-dimensional expanding plasma. First comparisons of the measured charge state distributions with x-ray photoionization models show reasonable agreement.
Original languageEnglish
Article number055002
Pages (from-to)055002-1-055002-4
Number of pages4
JournalPhysical Review Letters
Volume93(5)
Issue number5
DOIs
Publication statusPublished - 30 Jul 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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