Formation of SO, SO⁺, and S₂by Radiative Association

Rate coefficients for radiative association of SO, SO + , and S 2 are estimated. For temperatures ranging from 300 to 14,000 K, the direct radiative association rate coefficients are found to vary with temperature from 1.73 × 10 -19 to 7.29 × 10 -19 cm 3 s -1 and from 1.49 × 10 -21 to 3.70 × 10 -19 cm 3 s -1 for S 2 and SO, respectively. The rate coefficients for formation through the inverse predissociation for S 2 are found to vary from 3.59 × 10 -18 to 1.44 × 10 -20 cm 3 s -1 . For SO + , the direct rate coefficient varies rapidly with temperature from 3.62 × 10 -27 cm 3 s -1 at 2000 K to 2.34 × 10 -20 cm 3 s -1 at 14,000 K. The direct radiative association rate coefficients increase with the increase in temperature, but the inverse predissociation rate coefficients decrease with the increase in temperature.