✦ LIBER ✦

Models of Energy Dependence of the Secondary Ion Yield Compared with Experimental Results

✍ Scribed by Miklós Riedel; Heinz Düsterhöft; Jens-Per Kuska

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 307 KB
Volume: 11
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(199704)11:6<667::aid-rcm838>3.0.co;2-j

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✦ Synopsis

The energy dependence of secondary ion yield is determined both by the (Sigmund-Thompson or Boltzmann type) energy distribution function of the secondary (neutral) particles and by the (exponential or power law) ionization probability. The combination of these functions results in four possible mathematical models of secondary ion emission. The energy distributions of monoatomic singly charged positive ions emitted from pure metals and from amorphous alloys were studied experimentally. The parameters of the secondary ion emission models were calculated by fitting the equations. The binding energies obtained were compared with independent experimental data taken from the literature (dissociation energy, enthalpy of formation). Correlation between these values suggests that there are different possible emission pathways for different ion species emitted from solid targets.

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