Direct evidence of the surface track potential
- Department of Micro Engineering, Kyoto University, Yoshida-honmachi, Sakyo, Kyoto 606-8501 (Japan)
Angular and energy distributions of fragment protons dissociated from HeH{sup +} during grazing-angle scattering from a KCl (001) surface are measured. The surface of KCl (001) is heated at 180 deg. C and the beam current is kept lower than 1 fA to prevent macroscopic surface charging. The angular distribution of the fragment protons shows a well-defined peak similarly to the grazing-angle scattering of atomic ions. The observed peak, however, is shifted from the specular angle toward larger scattering angles. The observed angular shift for the trailing proton is larger than that for the leading proton. These results clearly indicate that the motion of the fragment protons is affected by the surface track potential induced by the partner He ion.
- OSTI ID:
- 21456941
- Journal Information:
- Physical Review. A, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevA.82.022901; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ATOMIC IONS
BEAM CURRENTS
CRYSTAL STRUCTURE
ENERGY SPECTRA
HELIUM IONS
POTASSIUM CHLORIDES
POTENTIALS
PROTONS
SCATTERING
SURFACES
ALKALI METAL COMPOUNDS
BARYONS
CHARGED PARTICLES
CHLORIDES
CHLORINE COMPOUNDS
CURRENTS
DISTRIBUTION
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HALIDES
HALOGEN COMPOUNDS
IONS
NUCLEONS
POTASSIUM COMPOUNDS
SPECTRA