Single and double charge transfer of He2+ ions with molecules at near-thermal energies

Abstract

Rate coefficients have been measured for charge-transfer reactions of He2+ ions with H2, N2, O2, CO, CO2, and H2O. The experiments were carried out using a selected-ion drift-tube mass spectrometer. Total rate coefficients are found to be very large and are generally close to the limiting Langevin capture rate coefficients or the corresponding ADO coefficients. The product-ion spectra indicate that both single and double charge transfer and possibly transfer ionization occur in these reactions.