Proper surface channelling of low energy argon ions incident on a nickel (110) crystal

I. N. Evdokimov; J. A. Van Den Berg; D. G. Armour

doi:10.1080/00337577908237936

Proper surface channelling of low energy argon ions incident on a nickel (110) crystal

I. N. Evdokimov, J. A. Van Den Berg, D. G. Armour

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

12 Citations (Scopus)

Abstract

The scattering behaviour of 6 keV argon ions from a nickel (110) surface has been investigated for specular reflection under grazing incidence conditions. The occurrence of an anomalously high energy loss has been confirmed and the transition from chain scattering at large scattering angles to a distinctly different type of scattering at small angles has been investigated. The characteristics of the low angle scattering phenomena, which dominate the observed spectra at scattering angles below about 18 degree , may be explained in terms of a surface hyperchannelling model in which the incident ions are confined to move within the shallow ″potential valleys″ between two atomic rows in the surface. The critical angle for occurrence of this phenomena which is distinctly different from surface semichannelling has been evaluated with Lindhard's standard string potential. The experimentally measured critical angles are in good agreement with the calculated ones.

Original language	English
Pages (from-to)	33-41
Number of pages	9
Journal	Radiation Effects
Volume	41
Issue number	1
DOIs	https://doi.org/10.1080/00337577908237936
Publication status	Published - 1979
Externally published	Yes

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title = "Proper surface channelling of low energy argon ions incident on a nickel (110) crystal",

abstract = "The scattering behaviour of 6 keV argon ions from a nickel (110) surface has been investigated for specular reflection under grazing incidence conditions. The occurrence of an anomalously high energy loss has been confirmed and the transition from chain scattering at large scattering angles to a distinctly different type of scattering at small angles has been investigated. The characteristics of the low angle scattering phenomena, which dominate the observed spectra at scattering angles below about 18 degree , may be explained in terms of a surface hyperchannelling model in which the incident ions are confined to move within the shallow ″potential valleys″ between two atomic rows in the surface. The critical angle for occurrence of this phenomena which is distinctly different from surface semichannelling has been evaluated with Lindhard's standard string potential. The experimentally measured critical angles are in good agreement with the calculated ones.",

keywords = "Argon, CRYSTALS - Radiation Effects, Ions, Nickel, ionising radiation, methodology, theoretical study",

author = "Evdokimov, {I. N.} and {Van Den Berg}, {J. A.} and Armour, {D. G.}",

year = "1979",

doi = "10.1080/00337577908237936",

language = "English",

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journal = "Radiation Effects and Defects in Solids",

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T1 - Proper surface channelling of low energy argon ions incident on a nickel (110) crystal

AU - Evdokimov, I. N.

AU - Van Den Berg, J. A.

AU - Armour, D. G.

PY - 1979

Y1 - 1979

N2 - The scattering behaviour of 6 keV argon ions from a nickel (110) surface has been investigated for specular reflection under grazing incidence conditions. The occurrence of an anomalously high energy loss has been confirmed and the transition from chain scattering at large scattering angles to a distinctly different type of scattering at small angles has been investigated. The characteristics of the low angle scattering phenomena, which dominate the observed spectra at scattering angles below about 18 degree , may be explained in terms of a surface hyperchannelling model in which the incident ions are confined to move within the shallow ″potential valleys″ between two atomic rows in the surface. The critical angle for occurrence of this phenomena which is distinctly different from surface semichannelling has been evaluated with Lindhard's standard string potential. The experimentally measured critical angles are in good agreement with the calculated ones.

AB - The scattering behaviour of 6 keV argon ions from a nickel (110) surface has been investigated for specular reflection under grazing incidence conditions. The occurrence of an anomalously high energy loss has been confirmed and the transition from chain scattering at large scattering angles to a distinctly different type of scattering at small angles has been investigated. The characteristics of the low angle scattering phenomena, which dominate the observed spectra at scattering angles below about 18 degree , may be explained in terms of a surface hyperchannelling model in which the incident ions are confined to move within the shallow ″potential valleys″ between two atomic rows in the surface. The critical angle for occurrence of this phenomena which is distinctly different from surface semichannelling has been evaluated with Lindhard's standard string potential. The experimentally measured critical angles are in good agreement with the calculated ones.

KW - Argon

KW - CRYSTALS - Radiation Effects

KW - Ions

KW - Nickel

KW - ionising radiation

KW - methodology

KW - theoretical study

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DO - 10.1080/00337577908237936

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JO - Radiation Effects and Defects in Solids

JF - Radiation Effects and Defects in Solids

SN - 1042-0150

IS - 1

ER -

Proper surface channelling of low energy argon ions incident on a nickel (110) crystal

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