| dc.description |
A flowing afterglow system has been used to measure the gas-phase, thermal-energy rate constants for reactions between a variety of ions and water-vapour molecules at 300K. A method of measuring water-vapour flow-rates has been developed which may be readily extended to other vapours. Rate constants, together with reaction processes, are reported for the ions He<sup>+</sup>, Ne<sup>+</sup>, Ar<sup>+</sup>, Ar+2, N<sup>+</sup>, N+2, H2O<sup>+</sup>, C<sup>+</sup>, CO<sup>+</sup> and O<sup>+</sup> reacting with water vapour, together with measurements of the three-body rate constants for the systems O+2+ H2O + Ar and H3O<sup>+</sup>+ H2O + He, and the Penning ionization cross-section for the He (2<sup>3</sup> S)+ H2O system. |
