Measurement and Modeling of Density-Sensitive Lines of Fe XIII in the Extreme Ultraviolet
We present an analysis of the spectral emission of Fe XIII near 200 {angstrom}. High resolution spectra were recorded at two densities ({approx} x 10{sup 11} and {approx} 10{sup 13} cm{sup -3}) in the laboratory and compared to collisional radiative model calculations based on the CHIANTI data base as well as to models using atomic data from distorted-wave and R-matrix calculations. The Fe XIII lines in this wavelength range are sensitive indicators of plasma density below {approx} 10{sup 11} cm{sup -3}. The laboratory data thus test the calculations in the astrophysically high-density limit. Significant differences between the measurements and models were found for several line ratios. Differences in the wavelengths employed in the different models also changed the agreement with the measurements. Best agreement was found in the comparisons with CHIANTI.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 973320
- Report Number(s):
- LLNL-JRNL-400639; ASJOAB; TRN: US1001721
- Journal Information:
- Astrophysical Journal, Vol. 689; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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