On the qunatum theory of the emission of secondary ions

Antal, J.

doi:10.1016/0375-9601(76)90235-8

Cited by 19 publications

(5 citation statements)

References 7 publications

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“…Several authors have recently compared experimental results on concentrated alloys with extended versions of the LTE model (R• [17], ]:{ODRIGUEZ [18], I:{IEDEL [19,20]), of the ASI model (~ARUSAWA [21] and [18--20]) and with some other simple models (PIvI• [22], JIRICEK [23]), but there is no proper model worked out for concentrated alloys. In this paper, we are going to describe the secondary ion emission of concentrated alloys using the pseudo-atom model [5] and to make a comparison between theoretical and experimental results collected from the literature.…”

Section: Introductionmentioning

confidence: 99%

“…These can be divided into two important groups: Fe-and Ni-based alloys. For pure metals, the probability of a secondary ion emission R + can be calculated b y the one-dimensional p s e u d o -a t o m emission model, which can be written in the following form [5]:…”

Section: Introductionmentioning

confidence: 99%

“…

The secondary ion emission of dilute and concentrated alloys was studied on the basis of the one-dimensional pseudo-atom elnission model [5]. The original model was extended to alloys.The computed relative ionization probabilities were compared with experimental results and agreement better than one order of magnitude was found for most alloys.

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confidence: 99%

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Secondary ion emission of homogeneous alloys

Riedel

Antal²,

Kugler³

1980

Acta Physica

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Secondary ion emission of homogeneous alloys

Riedel

Antal²,

Kugler³

1980

Acta Physica

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“…One of the authors proposed a possible physical mechanism, the pseudoatom approximation [1], a few years ago and one-dimensional approximate calculations were also published using step-potential model for some pure metals [2]. Compiling available experimental resuhs from the literature the agreements and the inherent limits of this simple model were investigated and recently published [3].…”

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confidence: 99%

Further studies on the secondary ion emission of pure metals using the pseudo-atom method

Antal¹,

Kugler²,

Orosz³

1981

Acta Physica

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“…In view of this very intrieate situation we have investigated theoretieal resuhs for 25 pure metals caleulated by a very simple one-dimensional model using the pseudo atom method [7]. This is a rather crude model of secondary ionic emission of positive ions, but in any case producing a simple formula without any fitting parameter, which is easy to evaluate and which can perhaps approximate the ionization probability in the low energy case.…”

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Critical investigation of the secondary ion emission of pure metals using the pseudoatom method

Antal¹,

Kugler²

1980

Acta Physica

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The experimental data of secondary ion emission of 25 pure meta]s were compared to theoretical results calculated using the one dimensional pseudo-atom model. The ionization probabilities were computed at different input data varying within the published experimental limits. Agreement between theoretical and experimental values of the probability of secondary ion emission was mostly better than ah order of magnitude for the metals investigated except for Zn, Ag and Sn.The theoretical description of secondary ion emission from a target due to an energetic primary ion bombardment is rather difficult a problem. The sputtered particles ate mostly neutral, on]y a very small amount of them being in ionized state. The ionization probability is very sensitive to target composition and surface eondition varying in the order of 10 -2-10 -6 range even for pure meta]s according to the experimental results.The different theoretical models [1--6] take into aecount mostly only one possible physical mechanism and they aro rather faz from any realised experimental environment. Even under these eircumstanees they mostly give only some guesses for the order of magnitude and very few of them result in a closed expression which can be evaluated using experimental input data to specify the target materials.The emission of seeondary ions may be caused by different possible mechanisms depencling on the energies of the secondary particles, target material, surface conditions and bombarding ions. In any case, it is a great challenge, even from the computational point of view, to obtain numerical results varying in four orders of magnitude from input data deviating for the different metals only in one order of magnitude. A second question is whether a theoretical model and the ealculated results can be correlated to the experimental ones because of the rather different neglections, assumptions and possible experimental and numerical errors depending on circumstances and the method used.In view of this very intrieate situation we have investigated theoretieal resuhs for 25 pure metals caleulated by a very simple one-dimensional model

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On the qunatum theory of the emission of secondary ions

Cited by 19 publications

References 7 publications

Secondary ion emission of homogeneous alloys

Secondary ion emission of homogeneous alloys

Further studies on the secondary ion emission of pure metals using the pseudo-atom method

Critical investigation of the secondary ion emission of pure metals using the pseudoatom method

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