F and F-aggregates colour centres in lithium flouridefor high spatial resolution x-ray imaging

R Montereali, Salvatore Almaviva, Francesca Bonfigli, Ivano Franzini, Daniele Pelliccia, Alessia Cedola, Stefano Lagomarsino

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

3 Citations (Scopus)

Abstract

Stable formation of primary F and aggregate F2 and F 3+ colour centres in LiF crystals irradiated with a X-ray table-top source was investigated by optical absorption and photoluminescence measurements as a function of the irradiation dose. The F absorption band intensity follows a power law behaviour as a function of dose with a single exponent equal to 0.77, a value in excellent agreement with the predictions of a unified model for colour centres formation. The aggregate defects photoluminescence response appears suitable for applications in high dynamic range imaging plate X-ray detectors based on photoluminescence of coloured LiF. The choice of polycrystalline LiF thin films grown on different substrates allows one to obtain high resolved images even when more penetrating X-rays are used, as the colour centres formation is limited in depth by the film total thickness.
Original languageEnglish
Title of host publicationJournal of Physics: Conference Series
EditorsM E G Valerio, Robert A Jackson
Place of PublicationUK
PublisherIOP Publishing
Pages1 - 6
Number of pages6
Volume249
ISBN (Print)1742-6596
DOIs
Publication statusPublished - 2010
Externally publishedYes
EventInternational Conference on Defects in Insulating Materials (ICDIM) - Aracaju Brazil, UK
Duration: 1 Jan 2010 → …

Conference

ConferenceInternational Conference on Defects in Insulating Materials (ICDIM)
CityUK
Period1/01/10 → …

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