Collision strengths for [N II], [O III], [Ne II] and [Ne III].
Abstract
The results of some recent collision strength calculations are given in a form convenient for the interpretation of observations. The calculations are estimated to be accurate within 10 percent based on: (1) comparison of observed and calculated energies for the bound states of the (electron + ion) systems. Semi-empirical corrections are made for forbidden Ne II; (2) comparisons of calculated positions obtained from iso-electronic sequence extrapolations. This of particular importance for forbidden O III; and (3) the convergence of the expansions used for the wave functions, in particular for forbidden N II and Ne III, where inclusion of additional states produces only small changes in the near-threshold results.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- March 1975
- DOI:
- 10.1093/mnras/170.3.475
- Bibcode:
- 1975MNRAS.170..475S
- Keywords:
-
- Collision Parameters;
- Electron Impact;
- Forbidden Bands;
- Ionic Collisions;
- Molecular Excitation;
- Nitrogen Ions;
- Oxygen Ions;
- Collision Rates;
- Electron Density (Concentration);
- Electron Energy;
- Numerical Analysis;
- Spectral Energy Distribution;
- Spectral Line Width;
- Wave Functions;
- Atomic and Molecular Physics