Recombination coefficients for C II lines

The calculations are carried out in the temperature range 500-20000K and for an electron density of 10^4^cm^-3^. The effects of electron collisions on the excited states are included.

The necessary bound-bound and bound-free radiative data are obtained from a new R-matrix calculation in which photoionization resonances are fully delineated, thereby accurately incorporating the effects of both radiative and dielectronic recombination. The R-matrix calculation includes all bound states with principal quantum number n<=15 and total orbital angular momentum L<=4. The effect of moving the resonance features to their experimentally determined positions is also investigated and found to be important at low temperatures.