| Effective collision strengths for infrared transitions in carbon-like ions |
| Lennon.DJ, Burke.VM |
| Astronomy & Astrophysics Supplement Series, 1994, Vol.103, No.2, pp.273-277 |
We present new calculations of cross-sections for the electron
impact excitation of carbon-like ions from N II to S XI, paying
particular attention to the infrared transitions between the
2p(2) P-3 J = 0,1,2 ground state fine-structure levels. We also
give rate coefficients, assuming a Maxwellian electron velocity
distribution, in the form of effective collision strengths for
these transitions up to an electron temperature of 10(5) K. We
also give results for transitions involving the other 2p(2)
terms (D-1 and S-1) as well as the 2s2p(3) (S-5) term. The
present results are in excellent agreement with a number of
similar calulations available in the literature but are more
comprehensive in scope.