Abstract

It is important to investigate whether non—relativistic errors in calculated oscillator strengths and related atomic data are large enough to obscure corrections applied in relativistic calculations. The magnitude such errors is however difficult to estimate. This is just one reason why the accuracy of the atomic data needs careful scrutiny. Application to the analysis of line intensities in laboratory and astropyhsical plasmas is a more general one. This review therefore focuses on errors that can affect the accuracy of calculated oscillator strengths. Precautions that can be taken to minimise errors arising from different causes are surveyed. Special attention is given to their reduction through the improvement of eigenvectors with Slater parameter optimisation methods. These semi-empirical methods for improving the accuracy of oscillator strengths can be important in fully relativistic calculations for a range of ions.

Keywords

Lithium Helium Flare 

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Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • B. C. Fawcett
    • 1
  1. 1.Rutherford Appleton LaboratoryScience and Engineering Research CouncilChilton, DidcotEngland

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