Thermal energy charge transfer betweenS2+andH2,N2,and CO

Abstract

We measured the charge transfer rate coefficients for the reactions ${\mathrm{S}}^{2+}+{\mathrm{H}}_2\to \mathrm{products},$ ${\mathrm{S}}^{2+}+{\mathrm{N}}_2\to \mathrm{products},$ and ${\mathrm{S}}^{2+}+\mathrm{CO}\to \mathrm{products}$ using a radio frequency trap. ${\mathrm{S}}^{2+}$ ions are produced by laser ablation of a solid tungsten disulfide target. We derive the rate coefficient of the reaction from the decay rate of the stored ions in the trap. The rate coefficients for the above three reactions are $1.58\left(0.13\right)\mathrm{}\times {10}^{-9}{\mathrm{cm}}^3{\mathrm{s}}^{-1}$ at $T_{\mathrm{equiv}}=1077\mathrm{}\mathrm{K},$ and $1.67\left(0.12\right)\mathrm{}\times {10}^{-9}$ and $1.78\left(0.13\right)\mathrm{}\times {10}^{-9}{\mathrm{cm}}^3{\mathrm{s}}^{-1}$ at $T_{\mathrm{equiv}}=6462\mathrm{}\mathrm{K}.$