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Modeling and Assessment of Afterglow Decay Curves from Thermally Stimulated Luminescence of Complex Garnets.
Khanin, Vasilii M; Vrubel, Ivan I; Polozkov, Roman G; Shelykh, Ivan A; Venevtsev, Ivan D; Meijerink, Andries; Wieczorek, Herfried; Boerekamp, Jack; Spoor, Sandra; Rodnyi, Piotr A; Ronda, Cees.
Afiliación
  • Khanin VM; Philips Healthcare , High Tech Campus 4 , 5656 AE Eindhoven , The Netherlands.
  • Vrubel II; Utrecht University , Princetonplein 5 , 3584 CC Utrecht , The Netherlands.
  • Polozkov RG; ITMO University , Kronverksky 49 , 197101 St. Petersburg , Russia.
  • Shelykh IA; ITMO University , Kronverksky 49 , 197101 St. Petersburg , Russia.
  • Venevtsev ID; ITMO University , Kronverksky 49 , 197101 St. Petersburg , Russia.
  • Meijerink A; Science Institute , University of Iceland , Dunhagi 3 , IS-107 , Reykjavik , Iceland.
  • Wieczorek H; Peter the Great St. Petersburg Polytechnic University , Polytekhnicheskaya 29 , 195251 St. Petersburg , Russia.
  • Boerekamp J; Utrecht University , Princetonplein 5 , 3584 CC Utrecht , The Netherlands.
  • Spoor S; Philips Healthcare , High Tech Campus 4 , 5656 AE Eindhoven , The Netherlands.
  • Rodnyi PA; Philips Healthcare , High Tech Campus 4 , 5656 AE Eindhoven , The Netherlands.
  • Ronda C; Philips Healthcare , High Tech Campus 4 , 5656 AE Eindhoven , The Netherlands.
J Phys Chem A ; 123(9): 1894-1903, 2019 Mar 07.
Article en En | MEDLINE | ID: mdl-30775917
Afterglow is an important phenomenon in luminescent materials and can be desired (e.g., persistent phosphors) or undesired (e.g., scintillators). Understanding and predicting afterglow is often based on analysis of thermally stimulated luminescence (TSL) glow curves, assuming the presence of one or more discrete trap states. Here we present a new approach for the description of the time-dependent afterglow from TSL glow curves using a model with a distribution of trap depths. The method is based on the deconvolution of the energy dependent density of occupied traps derived from TSL glow curves using Tikhonov regularization. To test the validity of this new approach, the procedure is applied to experimental TSL and afterglow data for Lu1Gd2Ga3Al2O12:Ce ceramics codoped with 40 ppm of Yb3+ or Eu3+ traps. The experimentally measured afterglow curves are compared with simulations based on models with and without the continuous trap depth distribution. The analysis clearly demonstrates the presence of a distribution of trap depths and shows that the new approach gives a more accurate description of the experimentally observed afterglow. The new method will be especially useful in understanding and reducing undesired afterglow in scintillators.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: J Phys Chem A Asunto de la revista: QUIMICA Año: 2019 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: J Phys Chem A Asunto de la revista: QUIMICA Año: 2019 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Estados Unidos