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Plasmon excitation and electron promotion in the interaction of slow Na+ ions with Al surfaces

โœ Scribed by M. Commisso; A. Bonanno; A. Oliva; M. Camarca; F. Xu; P. Riccardi; R.A. Baragiola

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
188 KB
Volume
230
Category
Article
ISSN
0168-583X

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โœฆ Synopsis

We studied the energy distributions of electrons emitted in the interaction of slow Na + ions with polycrystalline Al surfaces. To study sub-threshold plasmon excitation we performed measurements as a function of emission angle which showed the excitation of bulk plasmons, confirming the kinetic nature of the excitation process.

Electron spectra show narrow transition lines due to Auger decay in vacuum of sodium projectiles excited in the 2p-shell by electron promotion in collisions with Al target atoms. Several previously unidentified transition lines could be attributed to the autoionization of doubly excited projectiles.

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โœ P. Riccardi; P. Barone; A. Bonanno; A. Oliva; P. Vetrรฒ; M. Ishimoto; R.A. Baragi ๐Ÿ“‚ Article ๐Ÿ“… 2005 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 134 KB

We report experimental energy distributions and yields of electrons emitted from MgO surfaces under the impact of slow noble gas and sodium singly charged ions at varying incident energies. At impact energies below $1 keV, electron spectra are nearly independent of ion type and energy. A tail of hi