Electron-molecule collision ionization in hydrogen and deuterium

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Abstract
The ionization of a gas molecule has been experimentally studied by measurement of both the electron-molecule ionization cross section in an electron beam, Qi, and the electron ionization coefficient of an electron swarm, alpha /N. The results are presented for both hydrogen and deuterium and a comparison of the theoretical values of alpha /N, calculated from the present values of Qi using various electron energy distribution functions, F( epsilon ), with the present experimental values of alpha /N in hydrogen, indicates which form of F( epsilon ) is most probable in this gas.