Study of X-ray photoionized Fe plasma and comparisons with astrophysical modeling codes

被引：30

作者：

Foord, ME ^{[1
]}

Heeter, RF

Chung, HK

van Hoof, PAM

Bailey, JE

Cuneo, ME

Liedahl, DA

Fournier, KB

Jonauskas, V

Kisielius, R

Ramsbottom, C

Springer, PT

Keenan, FP

Rose, SJ

Goldstein, WH

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

[2] Sandia Natl Labs, Albuquerque, NM USA

[3] Queens Univ Belfast, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North Ireland

[4] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

来源：

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2006年 / 99卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

plasma spectroscopy; astrophysical observation; X-ray spectra; population kinetics;

D O I：

10.1016/j.jqsrt.2005.05.057

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 the ionization parameter in the plasma reaches values xi= 20 - 25 erg cm s(-1) under near steady-state conditions. A curve-of-growth analysis, which includes the effects of velocity gradients in a one-dimensional expanding plasma, fits the observed line opacities. Absorption lines are tabulated in the wavelength region 8-17 angstrom. Initial comparisons with a number of astrophysical X-ray photoionization models show reasonable agreement. (C) 2005 Published by Elsevier Ltd.

引用

页码：712 / 729

页数：18

共 40 条

[1] Non-LTE ionization and energy balance in high-Z laser plasmas including two-electron transitions [J].