Charge state effects in atom-surface scattering

Autor:	J. N. Defazio, T. M. Stephen, B. L. Peko
Rok vydání:	2003
Předmět:	Nuclear and High Energy Physics Hydrogen chemistry Proton Scattering Angle of incidence (optics) Atom chemistry.chemical_element Atomic physics Threshold energy Kinetic energy Instrumentation Ion
Zdroj:	Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 201:453-459
ISSN:	0168-583X
DOI:	10.1016/s0168-583x(02)01810-4
Popis:	Experimental results of atom-surface scattering are presented for variable energy (25–200 eV) collisions of hydrogen with a polycrystalline copper surface. Negative ion measurements are made for proton and hydrogen-atom beams impacting the surface. Energy and angular distributions of the resulting H − ions are analyzed for an 18° angle of incidence. Charge state effects become apparent in the H − ion energy spectra at incident energies less than ∼70 eV. Measurements show that H − ions resulting from incident hydrogen atoms are approximately 3 eV less energetic than those from protons with the same kinetic energy. Energy losses can be accounted for by the inclusion of charge state dependent thresholds in a linear function of incident energy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::aa7b4036032c8f3e092228fea876d02d https://doi.org/10.1016/s0168-583x(02)01810-4 Zobrazit plný text záznamu Full Text from ScienceDirect