Cross sections for the reaction H⁺+ H₂(<i>v</i>= 0-14) →H + H₂⁺at low collision energies

Abstract

Cross sections for the reaction H+ + H2→H + H2+ have been calculated in the centre-of-mass collision energy range of Ecm⩽20 eV by using the trajectory-surface-hopping method. The vibrational quantum number of the reactant H2 has been taken to be in the range 0⩽v⩽14, and the effect of v on H2+ production has been investigated. The results show that H2+ production increases rapidly as v increases up to v = 5, 6, and then decreases with further increase of v. The Maxwellian-averaged rate coefficients, which are expressed as functions of the plasma and H2 temperatures (T,E), have been estimated from the calculated cross sections in the range 0.1⩽T, E⩽5.0 eV.