Direct evidence for Coulombic ejection of electron-desorbed ions

Peter Williams; Greg Gillen

doi:10.1016/0039-6028(87)90030-6

Direct evidence for Coulombic ejection of electron-desorbed ions

Peter Williams, Greg Gillen

Molecular Sciences, School of (SMS)

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

We have measured energy distributions for F⁺ and F²⁺ ions, electron-desorbed from fluorine impurities on an aluminum surface and for Cl⁺ Cl²⁺ and I⁺ I²⁺ electron-desorbed from alkali halide surfaces by 12.5 keV electrons. The mean energies of the doubly-charged ions are twice the energies of the respective singly-charged ions. This result provides the first direct evidence for the Coulombic expulsion mechanism in electron-stimulated desorption proposed by Knotek and Feibelman.

Original language	English (US)
Pages (from-to)	L109-L112
Journal	Surface Science
Volume	180
Issue number	1
DOIs	https://doi.org/10.1016/0039-6028(87)90030-6
State	Published - Feb 1 1987

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/0039-6028(87)90030-6

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title = "Direct evidence for Coulombic ejection of electron-desorbed ions",

abstract = "We have measured energy distributions for F+ and F2+ ions, electron-desorbed from fluorine impurities on an aluminum surface and for Cl+ Cl2+ and I+ I2+ electron-desorbed from alkali halide surfaces by 12.5 keV electrons. The mean energies of the doubly-charged ions are twice the energies of the respective singly-charged ions. This result provides the first direct evidence for the Coulombic expulsion mechanism in electron-stimulated desorption proposed by Knotek and Feibelman.",

author = "Peter Williams and Greg Gillen",

note = "Funding Information: We acknowledge the support of NSF Grant, DMR 8206028 for the purchase of the Cameca IMS 3f.",

year = "1987",

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doi = "10.1016/0039-6028(87)90030-6",

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T1 - Direct evidence for Coulombic ejection of electron-desorbed ions

AU - Williams, Peter

AU - Gillen, Greg

N1 - Funding Information: We acknowledge the support of NSF Grant, DMR 8206028 for the purchase of the Cameca IMS 3f.

PY - 1987/2/1

Y1 - 1987/2/1

N2 - We have measured energy distributions for F+ and F2+ ions, electron-desorbed from fluorine impurities on an aluminum surface and for Cl+ Cl2+ and I+ I2+ electron-desorbed from alkali halide surfaces by 12.5 keV electrons. The mean energies of the doubly-charged ions are twice the energies of the respective singly-charged ions. This result provides the first direct evidence for the Coulombic expulsion mechanism in electron-stimulated desorption proposed by Knotek and Feibelman.

AB - We have measured energy distributions for F+ and F2+ ions, electron-desorbed from fluorine impurities on an aluminum surface and for Cl+ Cl2+ and I+ I2+ electron-desorbed from alkali halide surfaces by 12.5 keV electrons. The mean energies of the doubly-charged ions are twice the energies of the respective singly-charged ions. This result provides the first direct evidence for the Coulombic expulsion mechanism in electron-stimulated desorption proposed by Knotek and Feibelman.

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DO - 10.1016/0039-6028(87)90030-6

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VL - 180

SP - L109-L112

JO - Surface Science

JF - Surface Science

IS - 1

ER -

Direct evidence for Coulombic ejection of electron-desorbed ions

Abstract

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