We have measured fully differential cross sections for ionization of H2 by 75-keV proton impact. The coherence length of the projectile beam was varied by changing the distance between a collimating slit and the target. By comparing the cross sections measured for large and small coherence lengths pronounced interference effects could be identified in the data. A surprising result is that the phase angle in the interference term is primarily determined by the momentum transfer and only to a lesser extent by the recoil-ion momentum.
S. D. Sharma et al., "Fully Differential Study of Interference Effects in the Ionization of H₂ by Proton Impact," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 90, no. 5, pp. 052710-1 - 052710-8, American Physical Society (APS), Nov 2014.
The definitive version is available at https://doi.org/10.1103/PhysRevA.90.052710
Keywords and Phrases
Protons; Coherence lengths; Fully differential; Fully differential cross sections; Interference effects; Interference terms; Phase angles; Projectile beam; Proton impact; Ionization
International Standard Serial Number (ISSN)
Article - Journal
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01 Nov 2014