2018MNRAS.477..548A

The rate coefficient for the formation of aluminium monochloride, AlCl, from the radiative association of aluminium and chlorine atoms is estimated as a function of temperature. The coupling of the Al and Cl atoms through the A¹Π molecular electronic state, which undergoes radiative transition to the X¹Σ⁺ ground state, is the most efficient transition to form AlCl. The rate constant was found to vary with temperature according to the expressions k(T) = 1.22 x 10^–16(T/300)^0.40exp (-748/T) cm³ s^–1 for temperatures between 300 and 1000 K, and k(T) = 2.20 x 10^–16(T/300)^0.175exp (-1067/T) cm³ s^–1 for temperatures between 1000 and 14 000 K.