Abstract
Motivated by spectroscopic analysis of astrophysical and laboratory plasma, this thesis concerns the fundamental structure and spectral properties of atoms and their ions. The multiconfiguration Dirac-Hartree-Fock (MCDHF) method is used to predict the emission or absorption of radiation, by atomic systems in general, and of heavy and highly charged ions in particular.
The first set of publications, paper AI to AVII, concerns ab-initio predictions of atomic structure and radiative transition rates, with a particular focus on relativistic and electron correlation effects. Systematic and large-scale MCDHF calculations have been carried out, often in combination with electron-beam ion trap experiments.
The second set, BI to BVIII, presents a rigorous treatment of effects from non-spherical interactions with certain nuclei - hyperfine interaction - and external magnetic fields - Zeeman interaction - on atomic spectra. A general methodology has been developed and implemented in computer codes to include these perturbations in the wavefunctions and to determine their impact on the resulting spectra. Of particular interest are spectral intensity redistributions and unexpected transitions, and their applications to stellar abundance analyses, magnetic-fields effects in storage-ring experiments, and coronal magnetic-field measurements.
The first set of publications, paper AI to AVII, concerns ab-initio predictions of atomic structure and radiative transition rates, with a particular focus on relativistic and electron correlation effects. Systematic and large-scale MCDHF calculations have been carried out, often in combination with electron-beam ion trap experiments.
The second set, BI to BVIII, presents a rigorous treatment of effects from non-spherical interactions with certain nuclei - hyperfine interaction - and external magnetic fields - Zeeman interaction - on atomic spectra. A general methodology has been developed and implemented in computer codes to include these perturbations in the wavefunctions and to determine their impact on the resulting spectra. Of particular interest are spectral intensity redistributions and unexpected transitions, and their applications to stellar abundance analyses, magnetic-fields effects in storage-ring experiments, and coronal magnetic-field measurements.
| Translated title of the contribution | Teoretisk Atomspektroskopi av Jordbundna och Stellära Plasman |
|---|---|
| Original language | English |
| Qualification | Doctor |
| Awarding Institution |
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| Supervisors/Advisors |
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| Thesis sponsors | |
| Award date | 2016 Oct 21 |
| Place of Publication | Lund |
| Publisher | |
| ISBN (Print) | 978-91-7623-996-4 |
| ISBN (electronic) | 978-91-7623-997-1 |
| Publication status | Published - 2016 Sept |
Bibliographical note
Defence detailsDate: 2016-10-21
Time: 09:15
Place: Physicum, Rydberg Lecture Hall, Sölvegatan 14A, Lund
External reviewer(s)
Name: Lindroth, Eva
Title: Professor
Affiliation: Stockholm University, Department of Physics
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Subject classification (UKÄ)
- Atom and Molecular Physics and Optics
- Astronomy, Astrophysics and Cosmology
- Fusion, Plasma and Space Physics
Free keywords
- atomic structure
- atomic processes
- computer simulation
- electron correlation
- relativistic atomic theory
- plasma spectroscopy
- Zeeman effect
- magnetic fields
- hyperfine structure
- solar corona
- space weather
- stellar abundances
- Fysicumarkivet A:2016:Grumer