• Publications
  • Influence
Improved collision strengths and line ratios for forbidden [O III] far-infrared and optical lines
Far-infrared and optical [O III] lines are useful temeprature-density diagnostics of nebular as well as dust obscured astrophysical sources. Fine structure transitions among the ground state levels
Computer programs for the calculation of electron-atom collision cross sections. I. General formulation
The wavefunction for electron collisions with an N-electron atom is expanded in the form Psi = Sigma i Theta i+ Sigma j Phi jcj where Theta i is an antisymmetrized product of an atomic eigenfunction
Atomic data from the IRON Project. 1: Goals and methods
The IRON Project has the goal of computing on a large scale electron excitation cross sections and rates of astrophysical and technological importance, using the most reliable procedures currently
A programme for calculating atomic structures
A method for calculating atomic structures, suitable for the electronic computer, is outlined; the method allows for configuration interaction in a very general way. It is based on the expansion of
The UCL distorted wave code
Atomic data for opacity calculations. XXIII. The aluminium isoelectronic sequence
As a contribution to the international Opacity Project, large numbers of term energies, oscillator strengths and photoionization cross sections have been computed for Al-like ions of astrophysical
Atoms in Astrophysics
1. Low-Energy Electron Collisions with Complex Atoms and Ions.- 1. Introduction.- 2. Theory of Electron Collisions with Atoms and Ions.- 2.1. Expansion of the Collision Wave Function.- 2.2. Expansion