We report on a kinematically complete experiment on ionization of H2 by proton impact. While a significant impact of the projectile coherence properties on the scattering-angle dependence of double-differential cross sections (DDCSs), reported earlier, is confirmed by the present data, only weak coherence effects are found in the electron and recoil-ion momentum dependence of the DDCSs. This suggests that the phase angle in the interference term is determined primarily by the projectile momentum transfer rather than by the recoil-ion momentum. We therefore cannot rule out the possibility that the interference observed in our data is not primarily due to a two-center effect.
S. D. Sharma et al., "Complete Momentum Balance in Ionization of H₂ by 75-keV-Proton Impact for Varying Projectile Coherence," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 89, no. 5, pp. 052703-1-052703-6, American Physical Society (APS), May 2014.
The definitive version is available at https://doi.org/10.1103/PhysRevA.89.052703
Keywords and Phrases
Ionization; Momentum; Projectiles; Coherence effects; Coherence properties; Complete experiment; Double differential cross sections; Interference terms; Momentum balances; Proton impact; Scattering angles; Coherent scattering
International Standard Serial Number (ISSN)
Article - Journal
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01 May 2014