Resolution of the Long-Standing Overprediction of the Resonance to Intercombination Line-Intensity Ratio in mid-Z Neonlike Ions [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy, 2004.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- PDF-file: 14 pages; size: 1.7 Mbytes
- Additional Creators
- Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- The Ne-like resonance 2p⁶ ¹S-2p⁵3d¹P(3C) to intercombination 2p⁶ ¹S-2p⁵3d¹D(3D) line-intensity ratio R(3C/3D) has been extensively studied through high-accuracy measurements and calculations of atomic structure and collision cross sections. However, even state-of-the-art relativistic multiconfiguration atomic-physics codes generally predict values of R(3C/3D) that are significantly larger than those observed in coronal-density experiments. In this paper, predictions of R(3C/3D) across the Ne-like isoelectronic sequence from chromium to silver are brought into agreement with coronal-density experimental measurements in two steps: first by including a semi-empirical correction in the collisional atomic data due to configuration-interaction effects, and next by including the effects of cascades on the upper level populations. The configuration-interaction correction is inspired by the observation that nearly all data-production codes fail to predict R(3C/3D) correctly and is justified theoretically by a careful analysis of configuration-interaction contributions to level energies. The dependence of R(3C/3D) with electron density and its agreement with moderate-density measurements are shown. A brief description of the application of our technique to line ratios in He- and Ni-like x-ray spectra is also given.
- Report Numbers
- E 1.99:ucrl-jrnl-205066
ucrl-jrnl-205066 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
06/16/2004.
"ucrl-jrnl-205066"
Published in: Physical Review A, vol. 71, no. 1, January 31, 2005, pp. 012717 71 1 ISSN 1050-2947; PLRAAN FT
Hansen, S B; Fournier, K B. - Funding Information
- W-7405-ENG-48
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