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    STUDIA PHYSICA - Ediţia nr.1 din 2015  
         
  Articol:   THERMOLUMINESCENCE PROPERTIES OF THE 0.5P2O5 - xBaO - (0.5-x)K2O GLASS SYSTEM. A POSSIBLE DOSIMETRIC MATERIAL.

Autori:  I.B. COZAR, O. COZAR. 		 
       
         
  Rezumat:  

Published Online: 2015-06-01
Published Print: 2015-06-25

VIEW PDF: THERMOLUMINESCENCE PROPERTIES OF THE 0.5P2O5 - xBaO - (0.5-x)K2O GLASS SYSTEM. A POSSIBLE DOSIMETRIC MATERIAL

Thermoluminescence (TL) properties of freshly  irradiated phosphate glasses doped with BaO and K2O oxides at various concentrations were investigated. Barium-doped glasses (0.5P2O5 - 0.5BaO) show two TL peaks centered at 180 0C and 380 0C due to the defects generated by modifier Ba2+ ions inserted into the glass network. In the case of potassium-doped glasses (0.5P2O5 - 0.5K2O) an intense TL peak at 280 0C with an weak shoulder at 150 0C appear. The TL emission of the other phosphate glasses, 0.5P2O5 - xBaO - (0.5-x)K2O with 0.1  x  0.4, containing both type of the network modifier ions (K+, Ba2+) consist from the overlap of the above – mentioned luminescence spectra depending on the local energetic level diagrams of the luminescence centers. A linear dependence (R2 > 0.99) of the integral TL signals with the absorbed doses were evidenced for all the investigated glasses which can be considered as good materials for dosimetry in the 0 – 50 Gy range.

Keywords: P2O5 - BaO – K2O glasses, TL dosimetry
* Corresponding author e-mail: onuc.cozar@phys.ubbcluj.ro 		 
         
     
         
         
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