Ab initio potential energy curves for C+–H2 interaction. (a) 2Σ and 2Π (C ∞v symmetry) potential energy curves as a function of R. (b) 2 A 1, 2 B 1, and 2 B 2 (C 2v symmetry) potential energy curves as a function of R.
Plot of the radial Legendre expansion coefficients as a function of R.
Energy variation of the C+(2 P 3/2) + H2(j = 0) → C+(2 P 1/2) + H2(j = 0) and C+(2 P 3/2) + H2(j = 1) → C+(2 P 1/2) + H2(j = 1) integral cross sections.
Temperature variation of the spin-orbit quenching of the C+(2 P) ion through collisions with H2(j = 0, 1, 2).
Line flux (in K km s−1) of the C+ 2 P 3/2 → 2 P 1/2 emission line at 158 μm as a function of kinetic temperature for two different sets of rate coefficients [this work and Flower and Launay, FL77 (Ref. 8 )]. The inset shows the relative difference (in percent) between the line fluxes. See text for the detailed physical conditions.
Comparison of C+ 2 P 3/2 → 2 P 1/2 spin orbit quenching rate coefficients (units: 10−10 cm3 s−1).
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