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Gomez TA, Nagayama T, Cho PB, Zammit MC, Fontes CJ, Kilcrease DP, Bray I, Hubeny I, Dunlap BH, Montgomery MH, Winget DE. All-Order Full-Coulomb Quantum Spectral Line-Shape Calculations. PHYSICAL REVIEW LETTERS 2021; 127:235001. [PMID: 34936794 DOI: 10.1103/physrevlett.127.235001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 07/20/2021] [Accepted: 11/08/2021] [Indexed: 06/14/2023]
Abstract
Understanding how atoms interact with hot dense matter is essential for astrophysical and laboratory plasmas. Interactions in high-density plasmas broaden spectral lines, providing a rare window into interactions that govern, for example, radiation transport in stars. However, up to now, spectral line-shape theories employed at least one of three common approximations: second-order Taylor treatment of broadening operator, dipole-only interactions between atom and plasma, and classical treatment of perturbing electrons. In this Letter, we remove all three approximations simultaneously for the first time and test the importance for two applications: neutral hydrogen and highly ionized magnesium and oxygen. We found 15%-50% change in the spectral line widths, which are sufficient to impact applications including white-dwarf mass determination, stellar-opacity research, and laboratory plasma diagnostics.
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Affiliation(s)
- T A Gomez
- Sandia National Laboratories, Albuquerque, New Mexico 87123, USA
| | - T Nagayama
- Sandia National Laboratories, Albuquerque, New Mexico 87123, USA
| | - P B Cho
- Department of Astronomy, University of Texas, Austin, Texas 78712, USA
| | - M C Zammit
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - C J Fontes
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - D P Kilcrease
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - I Bray
- Curtin Institute of Computation and Department of Physics and Astronomy, GPO Box U1987 Perth, Western Australia 6845, Australia
| | - I Hubeny
- Department of Astronomy, University of Arizona, Tucson, Arizona 85721, USA
| | - B H Dunlap
- Department of Astronomy, University of Texas, Austin, Texas 78712, USA
| | - M H Montgomery
- Department of Astronomy, University of Texas, Austin, Texas 78712, USA
| | - D E Winget
- Department of Astronomy, University of Texas, Austin, Texas 78712, USA
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Abstract
The Spectral Line Shapes in Plasmas (SLSP) code comparison workshop series [...]
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