Theoretical study of the charge transfer and electron emission in the scattering of He+ by an AlF3 surface

Experimental results of electron emission from surfaces of aluminum fluoride impacted by keV noble gas ions (He+, Ne+, Ar+) show a high-energy structure that increases in intensity with ion energy in the case of He+ and Ar+ and is nearly independent on the impact energy for Ne+ ions. It is also obse...

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Published in:Physical review. B 2017-08, Vol.96 (7)
Main Authors: Iglesias-García, A, González, C, Goldberg, E C
Format: Article
Language:English
Subjects:
Aluminum fluorides
Argon
Charge transfer
Electron emission
Electrons
Emission analysis
Energy
Fluorides
Insulators
Metal fluorides
Metal surfaces
Neon
Rare gases
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González, C
Goldberg, E C
description Experimental results of electron emission from surfaces of aluminum fluoride impacted by keV noble gas ions (He+, Ne+, Ar+) show a high-energy structure that increases in intensity with ion energy in the case of He+ and Ar+ and is nearly independent on the impact energy for Ne+ ions. It is also observed that this high-energy secondary electron peak is less pronounced in the case of impact by Ar+. While ion-induced electron emission in metal surfaces is relatively well understood, in the case of wide band-gap insulators, such as metal fluorides, the nature of high-energy excitations is still an open question. In this work, we propose a mechanism of high-energy electron emission strongly linked to the ion neutralization process and the collision induced excitation of the electrons in the solid.
doi_str_mv 10.1103/PhysRevB.96.075428
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source American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects Aluminum fluorides
Argon
Charge transfer
Electron emission
Electrons
Emission analysis
Energy
Fluorides
Insulators
Metal fluorides
Metal surfaces
Neon
Rare gases
title Theoretical study of the charge transfer and electron emission in the scattering of He+ by an AlF3 surface
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