Ionization Cross Sections for Protons on Hydrogen Gas in the Energy Range 0.15 to 1.10 Mev

Abstract

Measurements have been made of the ionization cross section for protons incident on hydrogen gas in the energy range 0.15-1.10 Mev. The experimental cross section in this region can be represented by ${\ensuremath{\sigma}}_{i}=(3.45\ifmmode\pm\else\textpm\fi{}0.20){E}^{\ensuremath{-}(0.874\ifmmode\pm\else\textpm\fi{}0.010)}\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}17}$ ${\mathrm{cm}}^{2}$/molecule, where $E$ is the incident proton energy in Mev. The experimental results are in excellent agreement with a Born approximation calculation, which is discussed.