Thermoluminescence in LiF crystals and the role of impurities

M.A. Vincenti, M. Ambrico, G. Baldacchini, V.S. Kalinov, R.M. Montereali, E. Nichelatti, L. Schiavulli, A.P. Voitovich

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

Eight nominally pure lithium fluoride crystals, obtained from a single LiF crystal containing less than 100 ppm impurities, were irradiated by gamma-rays from a60Co source at room temperature, with doses from 8.4 to 2.5 105Gy, but one at -60 °C. Optical density measurements were performed to investigate the radiation-induced color centres (CCs) and to evaluate their concentrations. Thermoluminescence (TL) glow curves were collected and simulated by a first-order kinetics approach, and from the best-fit procedure ten glow peaks (GPs) spanning from 100 to 450 °C were highlighted. A comparative analysis of GP intensities and CC concentrations as a function of the irradiation dose has questioned their association as obtained in previous measurements, showing the impurities, less than 1018cm-3, still playing a predominant role in TL spectra. New measurements on LiF crystals more pure, at least an order of magnitude, are required to establish for sure the association of GPs to CCs.
Original languageEnglish
DOIs
Publication statusPublished - 20 Apr 2015
Externally publishedYes
Event12th Europhysical Conference on Defects in Insulating Materials, EURODIM 2014 - Canterbury, United Kingdom
Duration: 20 Apr 2015 → …

Conference

Conference12th Europhysical Conference on Defects in Insulating Materials, EURODIM 2014
CountryUnited Kingdom
CityCanterbury
Period20/4/15 → …

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Cite this

Vincenti, M. A., Ambrico, M., Baldacchini, G., Kalinov, V. S., Montereali, R. M., Nichelatti, E., ... Voitovich, A. P. (2015). Thermoluminescence in LiF crystals and the role of impurities. Paper presented at 12th Europhysical Conference on Defects in Insulating Materials, EURODIM 2014, Canterbury, United Kingdom. https://doi.org/10.1088/1757-899X/80/1/012022