A study on the collision of hydrogen ions H1+, H2+and H3+with a water-vapour target

Abstract

The authors have measured the total cross sections of charge exchange and electron loss for energies between 2 keV and 60 keV. The use of a calorimetric detector permits the authors to determine the ratio delta ₀/ delta ₊ of the secondary emission coefficient of neutral particles to that of ions for H₁⁰, H₁⁺, H₂⁰, H₂⁺, H₃⁰ and H₃⁺ impinging on a CuO-Be target (electron multiplier cathode). These results allow us to make absolute measurements for the cross sections sigma ₁₀ and sigma ₀₁. The experimental results are compared with those of other authors; particularly they allow the verification of the additive rule, starting from sigma ₁₀ and sigma ₀₁ values on O₂ and H₂ obtained by other authors. A theoretical treatment was attempted based upon Gryzinski's theory.