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Effective recombination coefficients are given for CII transitions between doublet states. The calculations are carried out in the temperature range and for an electron density of 104 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 and total orbital angular momentum . The effect of moving the resonance features to their experimentally determined positions is also investigated and found to be important at low temperatures.
Davey et al. (Tue,) studied this question.