Correlated measurements of radioluminescence, photoluminescence and thermoluminescence were performed including decay kinetics measurements under UV and 22Na(511 keV) photon excitations on the Mo-doped and doubly (Mo,Y) doped PbWO4 single crystals in a wide concentration range (200 50 000 ppm) of Mo-doping. Y-codoping results in significant trapping states suppression, which were induced by the Mo doping. Subsequently, an improvement of timing characteristics, that is a speed up of the scintillation decay process, of doubly doped material with respect to Y-free crystals is achieved. For the optimum Mo concentration of 2750-10 000 ppm the timing characteristics are fully comparable to an undoped PbWO4, while the light yield shows the enhancement by the factor of at least 2.2.
Complete Characterization of Doubly Doped pbwo4:Mo, Y Scintillator
Pazzi GP;Fabeni P;
2002
Abstract
Correlated measurements of radioluminescence, photoluminescence and thermoluminescence were performed including decay kinetics measurements under UV and 22Na(511 keV) photon excitations on the Mo-doped and doubly (Mo,Y) doped PbWO4 single crystals in a wide concentration range (200 50 000 ppm) of Mo-doping. Y-codoping results in significant trapping states suppression, which were induced by the Mo doping. Subsequently, an improvement of timing characteristics, that is a speed up of the scintillation decay process, of doubly doped material with respect to Y-free crystals is achieved. For the optimum Mo concentration of 2750-10 000 ppm the timing characteristics are fully comparable to an undoped PbWO4, while the light yield shows the enhancement by the factor of at least 2.2.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
