Auger Neutralization of Fast Ions at Surfaces

Taute, Elke

doi:10.1002/pssb.2221420213

Cited by 7 publications

(1 citation statement)

References 12 publications

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“…EF + W, Auger neutralization and violent collision processes dominate the charge exchange. Calculations of Taute< 41 ) show also that Auger processes can populate electronic terms with large orientation after ion-surface scattering. The neutral fraction after interaction of N+ ions with a Ni surface (see Figure 15), however, can be described by the model of resonant electron transfer incorporating the parallel velocity.…”

Section: Study Of Stable Terms Via Hyperfine Interactionmentioning

confidence: 94%

Coherence in Grazing Ion-Surface Collisions

Winter

Zimny

1988

Coherence in Atomic Collision Physics

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Section: Study Of Stable Terms Via Hyperfine Interactionmentioning

confidence: 94%

Coherence in Grazing Ion-Surface Collisions

Winter

Zimny

1988

Coherence in Atomic Collision Physics

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On the Nuclear Charge Dependence of Auger Neutralisation at Surfaces

Taute

Blum

1988

Physica Status Solidi (b)

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Recently, transition probabilities for Auger neutralisation of He'+ have been calculated for the case where the ion moves parallel to the surface with constant velocity 2 and where one conduction electron is captured i n a 2p-state of He+ /l/. The neutralisation rate was evaluated as a function of d and of the distance s between ion and surface. The calculations were performed by applying a simple model developed by Horiguchi et al. /Z/.In this note we briefly discuss the dependence of the neutralisation r a t e s on the nuclear charge Z of the incident ion, a s a function of the velocity a t fixed distances s. Our main purpose i s to get some rough ideas and first estimates about some of the relevant effects. We therefore apply the crude approximations discussed in /I/. The equations given in /I/ can be applied to the present case of interest if we substitute the expression 7 u + Z /4 for the parameter a in (8) to (11) of /1/ and if we multiply the total transition r a t e P ( s , u) by (Z/2)'.In /1/ a coordinate frame was used where the z-axis was parallel to the normal of the surface and the x-axis parallel to d. For the present calculations it is useful to choose a different coordinate frame with the y-axis parallel to the normal, the x-axis parallel to $, and the z-axis (quantisation axis) p e rpendicular to the x-y plane. In this frame we calculate the transition probabilities l M n (M) 1 for Auger processes where one of the electrons is captured in a Zp-state of the ion with magnetic quantum number M. 2These probabilities can be related to the parameters I At of /1/ by applying standard formulas of the angular momentum theory:1)

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On the Charge Distribution of Ions after Auger Neutralisation at Surfaces

Taute

Blum

1990

Physica Status Solidi (b)

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Auger neutralisation of Li3+-nuclei moving parallel to a metal surface (Al) is considered. For the case of capture of one electron in the 2porbital of the nuclei the charge distribution of the ions is calculated and interpreted.Es wird Augerneutralisation von Li3 +-Kernen, die sich parallel zu einer Metalloberflache (Al) bewegen, betrachtet. Fur den Fall des Einfangs eines Elektrons in das 2p-Orbital der Kerne wird die Ladungsverteilung der Ionen berechnet und interpretiert.

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Auger Neutralization of Fast Ions at Surfaces

Cited by 7 publications

References 12 publications

Coherence in Grazing Ion-Surface Collisions

Coherence in Grazing Ion-Surface Collisions

On the Nuclear Charge Dependence of Auger Neutralisation at Surfaces

On the Charge Distribution of Ions after Auger Neutralisation at Surfaces

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