Crystalline properties and colour centres in alkali halide thin films

M. Ferri, A. Scacco, F. Somma, R.M. Montereali, S. Martelli, G. Petrocco, L.C. Scavarda Do Carmo

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Abstract

Thin films of KCl, KBr, RbCl have been obtained by thermal evaporation on amorphous substrates with different deposition parameters. The crystalline structure and orientation have been determined, and the films resulted to be policrystals with high uniformity of orientation. Production of colour centres, achieved by irradiation with low-energy electrons, leads to F center concentrations barely observed in large crystals. The colouration kinetics is similar to that in the bulk, and shows after a maximum an exponential decay at high doses because of centre aggregation coupled to thermal effects. The films exhibit a bleaching process of the colour centres at room temperature, whose kinetics depends on the irradiation damage. © 1992, Taylor & Francis Group, LLC. All rights reserved.
Original languageEnglish
Pages (from-to)313 - 323
Number of pages11
JournalRadiation Effects and Defects in Solids
Volume124
Issue number3
DOIs
Publication statusPublished - 1 Oct 1992
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Radiation
  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Ferri, M., Scacco, A., Somma, F., Montereali, R. M., Martelli, S., Petrocco, G., & Scavarda Do Carmo, L. C. (1992). Crystalline properties and colour centres in alkali halide thin films. Radiation Effects and Defects in Solids, 124(3), 313 - 323. https://doi.org/10.1080/10420159208220204