DETERMINATION OF THE ELECTRON-ION DISSOCIATIVE RECOMBINATION COEFFICIENTS FOR SEVERAL MOLECULAR-IONS AT 300-K

The electron-ion dissociative recombination rate coefficients, alpha-e, have been determined for ten molecular ions, seven of which have not previously been measured. The data were obtained under truly thermal conditions at 300 K using a flowing afterglow/Langmuir probe (FALP) apparatus. Recombination coefficients were obtained for the following ions: CO2+ (alpha-e = 3.1 x 10(-7) cm3 s-1), N2+ (2.0), CO+ (1.6), KrH+ (< 0.2), XeH+ (< 0.4), HSO2+ (2.7), CH3CNH+ (3.3), CH3CHOH+ (3.9), C2H5CNH+ (4.7) and ((CH3)2CO)2H+ (14). The dissociative recombination of many of the ions studied may be important in planetary, cometary and terrestrial atmospheres and be involved in the synthesis of interstellar molecules.