Low energy charge exchange cross sections between sodium and H+, H+2, H+3, N+2, H2O+, and O+2

Abstract

We confined ions of different molecules in a Penning quadrupole ion trap and observed the exponential loss of the stored ion cloud as the result of charge exchange collisions with a Na atomic beam passing through the trap. From the ion loss rates and the Na density we determined the charge exchange cross sections between Na and the ions noted in the title at a mean ion energy of 2 eV. The results are in reasonable agreement with theoretical expectations and other experiments.

Effective oscillator strengths and transition energies for the hydrogen molecular ion

“…The quantal pseudostates of [10] were used for H and He. Charge exchange cross-sections at a mean ion eoergy of 2 eV [30] between H~-and Na have been measured. A quantum-mechanical theoretical calculation of the cross-section for Na and other alkalis would require an accurate potential energy surface and might utilize the isotropic and anisotropic dispersion energy coefficients given in table 8 calculated using published semi-empirical pseudostates for various alkalis.…”