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Title: Measurement and Modeling of Density-Sensitive Lines of Fe XIII in the Extreme Ultraviolet

Abstract

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.

Authors:
; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
973320
Report Number(s):
LLNL-JRNL-400639
Journal ID: ISSN 0004-637X; ASJOAB; TRN: US1001721
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 689; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS; 74 ATOMIC AND MOLECULAR PHYSICS; PLASMA DENSITY; R MATRIX; RESOLUTION; SIMULATION; SPECTRA; WAVELENGTHS

Citation Formats

Yamamoto, N, Kato, T, Beiersdorfer, P, and Lepson, J K. Measurement and Modeling of Density-Sensitive Lines of Fe XIII in the Extreme Ultraviolet. United States: N. p., 2008. Web.
Yamamoto, N, Kato, T, Beiersdorfer, P, & Lepson, J K. Measurement and Modeling of Density-Sensitive Lines of Fe XIII in the Extreme Ultraviolet. United States.
Yamamoto, N, Kato, T, Beiersdorfer, P, and Lepson, J K. 2008. "Measurement and Modeling of Density-Sensitive Lines of Fe XIII in the Extreme Ultraviolet". United States. https://www.osti.gov/servlets/purl/973320.
@article{osti_973320,
title = {Measurement and Modeling of Density-Sensitive Lines of Fe XIII in the Extreme Ultraviolet},
author = {Yamamoto, N and Kato, T and Beiersdorfer, P and Lepson, J K},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/973320}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = ,
volume = 689,
place = {United States},
year = {Thu Jan 17 00:00:00 EST 2008},
month = {Thu Jan 17 00:00:00 EST 2008}
}