Bibliographic Citation | |
Full Text | |
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DOI | 10.2172/238552 |
Title | Laboratory astrophysics: Measurements of n = n{prime} to n = 2 line emission in Fe{sup 16+} to Fe{sup 23+} |
Creator/Author | Savin, D.W. [Univ. of California, Berkeley, CA (United States). Space Sciences Lab.] ; Beiersdorfer, P. ; Lopez-Urrutia, J.C. ; Decaux, V. ; Liedahl, D.A. ; Reed, K.J. ; Widmann, K. [Lawrence Livermore National Lab., CA (United States). Dept. of Physics and Space Technology] ; Brown, G.V. [Auburn Univ., AL (United States). Dept. of Physics] ; Kahn, S.M. [Columbia Univ., New York, NY (United States). Dept. of Physics] |
Publication Date | 1996 Mar 05 |
OSTI Identifier | OSTI ID: 238552; Legacy ID: DE96010823 |
Report Number(s) | UCRL-JC--123517; CONF-960155--4 |
DOE Contract Number | W-7405-ENG-48 |
DOI | 10.2172/238552 |
Other Number(s) | Other: ON: DE96010823; CNN: Grant NASA NAGW-4185; TRN: TRN: AHC29612%%102 |
Resource Type | Technical Report |
Resource Relation | Conference: 10. American Physical Society (APS) topical conference on atomic processes and plasmas, San Francisco, CA (United States), 14-18 Jan 1996; Other Information: PBD: 5 Mar 1996 |
Research Org | Lawrence Livermore National Lab., CA (United States) |
Sponsoring Org | USDOE, Washington, DC (United States);National Aeronautics and Space Administration, Washington, DC (United States) |
Subject | 66 PHYSICS; IRON IONS; EMISSION SPECTRA; SOLAR CORONA; X-RAY SPECTRA; GALAXY CLUSTERS; ASTROPHYSICS; X-RAY SPECTROSCOPY; ENERGY-LEVEL TRANSITIONS; MULTICHARGED IONS; STARS; GALAXY NUCLEI; EXPERIMENTAL DATA |
Description/Abstract | One of the dominant forms of astronomical line emission in the 6 {angstrom} to 18 {angstrom} spectral region is line emission produced by n = n{prime} to n = 2 transitions in Fe{sup 16+} to Fe{sup 23+} (i.e., Fe L-shell n-2 line emission). Using the Lawrence Livermore National Laboratory electron beam ion trap (EBIT) facility, the authors have carried out a number of measurements designed to address astrophysical issues concerning Fe L-shell line emission. Desired ions are produced and trapped using the nearly monoenergetic electron beam of EBIT. Trapped ions are collisionally excited and the resulting X-ray line emission detected using Bragg crystal spectrometers. They have recently completed a line survey of Fe L-shell 3-2 line emission. The line survey will allow a more reliable accounting of line blending in astronomical spectra. They have now begun a series of broadband, high resolution line ratio measurements. These measurements are designed to benchmark atomic calculations used in astronomical plasma emission codes and also for comparison with X-ray spectral observations of astronomical objects. Initial measurements have been carried out in Fe{sup 23+}. Preliminary results agree with distorted wave calculations to within 20% and better. |
Country of Publication | United States |
Language | English |
Format | Medium: P; Size: 10 p. |
Availability | OSTI as DE96010823 To purchase this media from NTIS, click here |
System Entry Date | 2008 Feb 04 |
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