A. Twardak

Thermoluminescent Properties of Undoped and Ce-Doped Lutetium Orthosilicate and Yttrium Orthosilicate Single Crystals and Single Crystalline Films Scintillators

In this work the comparative analysis of thermoluminescent properties of undoped and Ce-doped single crystals (SC) and single crystalline films (SCF) of Lu₂SiO₅ (LSO) and Y₂SiO₅ (YSO) orthosilicates were performed. The SC samples were prepared with the Czochralski method, and SCF were grown by the liquid phase epitaxy technique. We show that such different methods of material preparation resulted in different thermoluminescent properties of undoped and Ce³⁺ doped LSO and YSO SC and SCF caused by the presence host defects (first of all, oxygen vacancies) as trapping centers in SC and formation of Pb²⁺-Ce⁴⁺ pair centers in SCF.

Scintillating Screens Based on the Single Crystalline Films of Multicomponent Garnets: New Achievements and Possibilities

The paper is dedicated to development of the novel scintillating screens based on single crystalline films (SCF) of Ce doped Lu_{3 - x}Tb_xAl_{5 - y}GayO₁₂ multicomponent garnets at x = 2 - 3 and y = 0 - 2.5 onto Y₃Al₅O₁₂ (YAG) and Gd₃Al_2.5Ga_2.5O₁₂ (GAGG) substrates using the liquid phase epitaxy (LPE) method. We report the optimized content and high scintillation figure of merit of SCF of these garnets grown by the LPE method with using PbO based flux. Namely, the Tb₃Al_2.5Ga_2.5O₁₂:Ce SCFs possess the highest values of light yield (LY) compared to all earlier investigated SCF samples, with their LY exceeding by 2.35 and 1.15 times the LY values for YAG:Ce and LuAG:Ce SCF scintillators, respectively. The SCFs of the mentioned compounds show very lower thermoluminescence in the above room temperature range and relatively fast scintillation decay.

Some features of YAlO 3 :Mn-based crystalline and ceramic TL detectors

The work presents some results on thermoluminescent dosimetry properties of YAlO₃:Mn-based single crystalline and ceramic detectors for gamma (⁶⁰Co), beta (⁹⁰Sr/⁹⁰Y) and alpha (²⁴¹Am) radiation.

Thermoluminescence properties of LSO:Ce and YSO:Ce films grown from PbO and Bi 2 O 3 fluxes

The comparative analysis of thermoluminescent properties of Ce-doped single crystalline films (SCF) of Lu₂SiO₅ (LSO) and Y₂SiO₅ (YSO) orthosilicates, grown by LPE method from two different (PbO and Bi₂O₃) fluxes were performed in this work. We show that the difference in technology of material preparation resulted in different thermoluminescent behaviors of LSO:Ce and YSO:Ce SCFs caused by the formation of the Pb²⁺-Ce⁴⁺ and Bi³⁺-Ce³⁺ centers in them.

OSL properties of lithium aluminate crystals grown with Micro-Pulling-Down technique

Selected optically stimulated luminescence properties of lithium aluminate crystals are presented within this work. Crystals were grown using Micro-Pulling-Down technique. The growth parameters and XRD analysis of obtained samples are demonstrated. OSL decay curves, thermal stability and fading of samples prepared under different conditions are compared.

TSL properties of A 2 SiO 5 and A 2 SiO 5 :Ce (A=Y, Lu) single crystals and single crystalline films

In this work the comparative analysis of the thermostimulated luminescence (TSL) properties of various silicate crystals (undoped and Ce-doped Y<inf>2</inf>SiO<inf>5</inf> (YSO) and Lu<inf>2</inf>SiO<inf>5</inf> (LSO) single crystals (SC) and single crystalline films (SCF)) under excitation by alpha and beta particles, gamma quanta and daily light has been performed.