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Tesi etd-03222018-120237


Tipo di tesi
Tesi di laurea magistrale
Autore
BALESTRI, CHIARA
URN
etd-03222018-120237
Titolo
Optically stimulated luminescence: synthesis and characterization of dosimeters based on calcium sulfate, doped with different rare earth elements
Dipartimento
INGEGNERIA DELL'INFORMAZIONE
Corso di studi
INGEGNERIA BIOMEDICA
Relatori
relatore Prof. d'Errico, Francesco
relatore Prof.ssa De Sousa Lalic, Susana
Parole chiave
  • dosimeters
  • luminescence
  • Optically
  • stimulated
Data inizio appello
03/05/2018
Consultabilità
Non consultabile
Data di rilascio
03/05/2088
Riassunto
Optically stimulated luminescence (OSL) is increasingly used as a dosimetric technique in various fields such as medical, environmental and spatial dosimetry, sediments and archaeological dating. It is a phenomenon in which the luminescence is stimulated by the absorption of optical energy, rather than the thermal one. In recent years there has been an increasing interest in the study of possible alternative materials that have a typical OSL behavior to be used in order to evaluate the absorbed dose by individuals in the personal dosimetry field. In this work a dosimeter based on calcium sulfate was produced and its luminescence properties were characterized, both in the form of powder and pellets mixed with teflon. The analysis was carried out adding to each sample different rare earth elements, in order to evaluate the difference in the emission of the signal. Finally, a crystallographic analysis was carried out using X-ray diffraction to evaluate possible variations within the crystalline structure.
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