Astron. Astrophys. Suppl. Ser. 134, 369-375
H.E. Saraph - P.J. Storey
Send offprint request: H.E. Saraph
Department of Physics and Astronomy, University College London, London WC1E 6BT, UK
Received June 8; accepted August 7, 1998
This is the third paper in a series giving collision rates for electron excitation of the 2P - 2P ground state fine-structure transition in aluminium-like ions. In this paper we give data for the transitions in P III (17.9 m), S IV (m) and Cl V (6.71 m). For the P and Cl ions the only existing results are nearly 30 years old and were obtained using a method which does not incorporate resonance effects. For S IV, previous close-coupling calculations do exist but we show that our more elaborate calculation changes the rate coefficients by about 50% at lower temperatures.
Key words: atomic data
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