Energy loss of protons passing through hydrogen

Abstract
The cross-sections of processes involving protons and hydrogen atoms calculated by Bates, Dalgarno and Griffing using the Born approximation are employed to make a detailed analysis of the contributions of excitation, ionization and capture to the stopping power of a gas of atomic hydrogen for a beam consisting initially of protons. A range of beam energies from 10 keV to 3 MeV is covered. The computed total energy loss is compared with experimental data and the accuracy of the Born approximation for heavy particle collisions is discussed.

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