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Laboratory and stellar spectroscopy of the complex ions Fe+, Mo+, Th+ and U+

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Author

Summary, in English

The new generation of high resolution astronomical instruments such as the Hubble Space Telescope (HST) or the Very Large Telescope (VLT) has renewed the demand for accurate atomic parameters like wavelengths, oscillator strengths and line profiles accompanied by reliable uncertainty estimates. Fourier transform spectroscopy has proven to be a powerful tool when measuring these parameters. In this thesis new oscillator strengths in Fe II, Mo II, Th II and U II measured with Fourier transform spectroscopy are presented together with a method of how to treat the uncertainties of f-values measured with the emission technique. An extended term analysis of Mo II is also presented, including more than 100 new energy levels. Calculated f-values for all classified Mo II transitions are included. Some astrophysical applications of the new atomic data are demonstrated.

Publishing year

2002

Language

English

Document type

Dissertation

Publisher

Hampus Nilsson, Lund University,

Topic

  • Astronomy, Astrophysics and Cosmology

Keywords

  • molybdenum
  • iron
  • thorium
  • uranium.
  • Atomic and molecular physics
  • Atom- och molekylärfysik
  • Astronomy
  • space research
  • cosmic chemistry
  • Astronomi
  • rymdvetenskap
  • kosmisk kemi
  • Condensed matter:electronic structure
  • electrical
  • spektroskopi
  • magnetisk resonans
  • supraledare
  • magnetiska och optiska)
  • egenskaper (elektriska
  • Kondenserade materiens egenskaper:elektronstruktur
  • spectroscopy
  • relaxation
  • magnetic resonance
  • magnetic and optical properties
  • supraconductors
  • astrophysics
  • radiative lifetimes
  • oscillator strengths
  • term analysis
  • Fourier transform spectroscopy
  • branching fractions
  • Fysicumarkivet A:2002:Nilsson

Status

Published

Supervisor

  • [unknown] [unknown]

ISBN/ISSN/Other

  • ISBN: 91-628-5205-1

Defence date

1 June 2002

Defence time

13:15

Defence place

Lundmarkssalen, Lund Observatory

Opponent

  • Torkild Andersen (Prof)