Reactions of H+ in H2 and D+ in D2; Mobilities of Hydrogen and Alkali Ions in H2 and D2 Gases

Abstract

Measurements of transport parameters of low-energy mass-identified ions in ${\mathrm{H}}_2$ and ${\mathrm{D}}_2$ gases have been made in a drift-tube mass spectrometer at room temperatures. In addition, the variable drift distance of this apparatus has been used to vary the residence time of the ions in the gases to determine ion-molecule reaction rates. The zero-field reduced mobilities of ${\mathrm{H}}^{+}$ and $\mathrm{H}_3^{}{}_{}{}^{+}$ in ${\mathrm{H}}_2$ were found to be 15.7 ± 0.6 and 11.1 ± 0.5 ${\mathrm{cm}}^2$/V sec, respectively. Those for ${\mathrm{D}}^{+}$ and $\mathrm{D}_3^{}{}_{}{}^{+}$ in ${\mathrm{D}}_2$ were found to be 11.2 ± 0.5 and 8.0 ± 0.3 ${\mathrm{cm}}^2$/V sec, respectively. The zero-field reduced mobilities for ${\mathrm{Li}}^{+}$, ${\mathrm{Na}}^{+}$, and ${\mathrm{K}}^{+}$ ions in ${\mathrm{H}}_2$ were measured to be 12.3 ± 0.6, 12.2 ± 0.6, and 12.8 ± 0.6 ${\mathrm{cm}}^2$/V sec. The zero-field reduced mobilities for these same alkali ions in ${\mathrm{D}}_2$ were measured to be 9.6 ± 0.5, 8.9 ± 0.4, and 9.4 ± 0.5 ${\mathrm{cm}}^2$/V sec, respectively. The mobilities of ${\mathrm{H}}^{+}$, $\mathrm{H}_3^{}{}_{}{}^{+}$, ${\mathrm{Li}}^{+}$, ${\mathrm{Na}}^{+}$, and ${\mathrm{K}}^{+}$ in ${\mathrm{H}}_2$ were found to be related to the mobilities of ${\mathrm{D}}^{+}$, $\mathrm{D}_3^{}{}_{}{}^{+}$, ${\mathrm{Li}}^{+}$, ${\mathrm{Na}}^{+}$, and ${\mathrm{K}}^{+}$ in

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