Mass-resolved low-energy back-scattering of alkali ions

Klaus Franzreb; Peter Williams

doi:10.1016/S0169-4332(02)00707-9

Mass-resolved low-energy back-scattering of alkali ions

Klaus Franzreb, Peter Williams

Molecular Sciences, School of (SMS)

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

4 Scopus citations

Abstract

The emission charge state dependence of alkali metal ions back-scattered in binary collisions has been evaluated. For this purpose, mass-resolved LEIS in an SIMS instrument was utilized during bombardment of ¹³³ Cs ⁺ or ³⁹ K ⁺ on metal surfaces (Ta, Au or Cu) under dynamic sputtering conditions. Back-scattered singly positively charged alkali ions were found to be by far predominant (i.e. with an at least a factor of 1000 larger flux than other ejected alkali ions). Back-scattered negative alkali ions ( ¹³³ Cs ^- , ³⁹ K ^- ) as well as doubly positively charged alkali ions ( ¹³³ Cs ⁺⁺ , ³⁹ K ⁺⁺ ) were also observed, while other emission charge states (such as triply positively charged alkali ions) could not be detected.

Original language	English (US)
Pages (from-to)	98-101
Number of pages	4
Journal	Applied Surface Science
Volume	203-204
DOIs	https://doi.org/10.1016/S0169-4332(02)00707-9
State	Published - Jan 15 2003

Keywords

Alkali ions
Cesium
Low-energy ion scattering
Mass-resolved analysis
Potassium

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1016/S0169-4332(02)00707-9

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title = "Mass-resolved low-energy back-scattering of alkali ions",

abstract = " The emission charge state dependence of alkali metal ions back-scattered in binary collisions has been evaluated. For this purpose, mass-resolved LEIS in an SIMS instrument was utilized during bombardment of 133 Cs + or 39 K + on metal surfaces (Ta, Au or Cu) under dynamic sputtering conditions. Back-scattered singly positively charged alkali ions were found to be by far predominant (i.e. with an at least a factor of 1000 larger flux than other ejected alkali ions). Back-scattered negative alkali ions ( 133 Cs - , 39 K - ) as well as doubly positively charged alkali ions ( 133 Cs ++ , 39 K ++ ) were also observed, while other emission charge states (such as triply positively charged alkali ions) could not be detected.",

keywords = "Alkali ions, Cesium, Low-energy ion scattering, Mass-resolved analysis, Potassium",

author = "Klaus Franzreb and Peter Williams",

note = "Funding Information: Supported in part by NSF Grant CHE 0111 654.",

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doi = "10.1016/S0169-4332(02)00707-9",

language = "English (US)",

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journal = "Applied Surface Science",

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T1 - Mass-resolved low-energy back-scattering of alkali ions

AU - Franzreb, Klaus

AU - Williams, Peter

N1 - Funding Information: Supported in part by NSF Grant CHE 0111 654.

PY - 2003/1/15

Y1 - 2003/1/15

N2 - The emission charge state dependence of alkali metal ions back-scattered in binary collisions has been evaluated. For this purpose, mass-resolved LEIS in an SIMS instrument was utilized during bombardment of 133 Cs + or 39 K + on metal surfaces (Ta, Au or Cu) under dynamic sputtering conditions. Back-scattered singly positively charged alkali ions were found to be by far predominant (i.e. with an at least a factor of 1000 larger flux than other ejected alkali ions). Back-scattered negative alkali ions ( 133 Cs - , 39 K - ) as well as doubly positively charged alkali ions ( 133 Cs ++ , 39 K ++ ) were also observed, while other emission charge states (such as triply positively charged alkali ions) could not be detected.

AB - The emission charge state dependence of alkali metal ions back-scattered in binary collisions has been evaluated. For this purpose, mass-resolved LEIS in an SIMS instrument was utilized during bombardment of 133 Cs + or 39 K + on metal surfaces (Ta, Au or Cu) under dynamic sputtering conditions. Back-scattered singly positively charged alkali ions were found to be by far predominant (i.e. with an at least a factor of 1000 larger flux than other ejected alkali ions). Back-scattered negative alkali ions ( 133 Cs - , 39 K - ) as well as doubly positively charged alkali ions ( 133 Cs ++ , 39 K ++ ) were also observed, while other emission charge states (such as triply positively charged alkali ions) could not be detected.

KW - Alkali ions

KW - Cesium

KW - Low-energy ion scattering

KW - Mass-resolved analysis

KW - Potassium

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SP - 98

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JO - Applied Surface Science

JF - Applied Surface Science

ER -

Mass-resolved low-energy back-scattering of alkali ions

Abstract

Keywords

ASJC Scopus subject areas

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