Abstract
We have investigated fractions of negative hydrogen atoms after the interaction of fast protons with energies ranging from 1–30 keV with a clean Al(111) surface under grazing angles of incidence. The observed H − fractions are generally small ( < 0.5%) and depend strongly on the angle of emergence and the state of preparation of the target surface. We find a resonance type of dependence for the negative ion yield on projectile velocity component parallel to the surface plane, which can be understood in a model of resonant one-electron tunneling between surface and atom. This model implies that H − formation in grazing surface scattering proceeds in a two-step process of single-electron transfer.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
