Doubly differential spectra of scattered protons in ionization of atomic hydrogen

M. Schulz*, A. C. Laforge, K. N. Egodapitiya, J. S. Alexander, A. Hasan, M. F. Ciappina, A. C. Roy, R. Dey, A. Samolov, A. L. Godunov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


We have measured and calculated doubly differential cross sections for ionization of atomic hydrogen using 75-keV proton impact for fixed projectile energy losses as a function of scattering angle. This collision system represents a pure three-body system and thus offers an accurate test of the theoretical description of the few-body dynamics without any complications presented by electron correlation in many-electron targets. Comparison between experiment and several theoretical models reveals that the projectile-target nucleus interaction is best described by the operator of a second-order term of the transition amplitude. Higher-order contributions in the projectile-electron interaction, on the other hand, are more appropriately accounted for in the final-state wave function.

Original languageEnglish
Article number052705
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number5
StatePublished - 21 May 2010
Externally publishedYes


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