Electron-temperature dependence of dissociative recombination of electrons withCO+·(CO)n-series ions

Abstract

A microwave-afterglow mass-spectrometer apparatus has been used to determine the dependence on electron temperature $T_e$ of the recombination coefficients ${\alpha }_n$ of the dimer and trimer ions of the series $\mathrm{C}{\mathrm{O}}^{+}·{\left(\mathrm{CO}\right)}_n$. We find ${\alpha }_1=(1.3\mathrm{}\pm 0.3)\times {10}^{-6\mathrm{}}{\left[\frac{T_e\left(\mathrm{K}\right)}{300}\right]}^{-0.34\mathrm{}}$ and ${\alpha }_2=(1.9\mathrm{}\pm 0.4)\times {10}^{-6\mathrm{}}{\left[\frac{T_e\left(\mathrm{K}\right)}{300}\right]}^{-0.33\mathrm{}}$ ${\mathrm{cm}}^3$/sec. These dependences on $T_e$ are quite different from those obtained previously for polar-cluster ions of the hydronium and ammonium series but are similar to that for simple diatomic ions.