Radiative Association for the Formation of phosphorus monochloryl Cation (PCl+) and aluminium monochloride (AlCl)

Cross-sections and rate coefficients for the radiative association processes of Al(2P) with Cl(2P) for the formation of aluminium monochloride (AlCl) and P+(3P) with Cl(2P) to form phosphorus monochloryl cation (PCl+) have been estimated as a function of temperature. Rate coefficients have been estimated from cross-sections, which are calculated using a quantum mechanical method. They are found to vary from 4.95 × 10–21 to 4.24 × 10–16 and from 7.10 × 10–18 to 3.50 × 10–17 cm3 s–1 for AlCl and PCl+, respectively, for temperatures ranging from 10 to 15 000 K. The obtained rate constants are fitted with the Arrhenius–Kooij functions for incorporation into astrochemical reaction data bases.