Thermoluminescence fading studies: Implications for long-duration space measurements in Low Earth Orbit

Within a 1.5 year comprehensive fading experiment several batches of LiF:Mg,Ti and LiF:Mg,Cu,P thermoluminescence detectors (TLDs) were studied. The TLDs originated from two manufacturers and were processed by three laboratories using different annealing and readout conditions. The TLDs were irradiated with two radiation modalities (gamma-rays and thermal neutrons) and were stored at two temperatures (-17.4C and +18.5C). The goal of the experiment was to verify the stability of TLDs in the context of their application in long-term measurements in space. The results revealed that the response of all TLDs is stable within 10% for the studied temperature range. No influence of the radiation type was found. These results indicate that for the properly oven-annealed LiF TLDs, fading is not a significant problem, even for measuring periods longer than a year

Comparative analysis of the scintillation and thermoluminescent properties of Ce-doped LSO and YSO crystals and films

The work is devoted to the comparative analysis of the scintillation and thermoluminescent properties of the undoped and Ce-doped A2SiO5 (A = Lu, Y) orthosilicates, prepared in single crystal form by the Czochralski method and in the form of single crystalline film using the liquid phase epitaxy method. We have found that differences in the methods of material preparation resulted in the significant differences in the scintillation and thermoluminescent properties of undoped and Ce doped YSO and LSO crystals and films. Such differences are caused by the presence or absence of main host defects (first of all, oxygen vacancies and flux related impurities) as emission and trapping centers in YSO and LSO crystals and films

Comparative study of TSL and OSL properties of LSO and LSO:Ce single crystals and single crystalline films

This paper presents comparative analysis of thermally (TL) and optically (OSL) stimulated luminescence of a number of lutetium orthosilicates (LSO) single crystals and single crystalline films. Samples under study were prepared with two techniques: Czochralski method for single crystals and liquid phase epitaxy method for single crystalline films. This work describes in particular similarities and differences in OSL and TL response for alpha and beta particles between samples with different crystal form. The emission spectrum of LSO was found to extend from 350 nm to 500 nm, with a maximum near 430 nm. Intensity of TL and OSL of some samples to beta radiation was found to be quite high, indicating a potential of LSO for applications in dosimetry

Luminescent and scintillation properties of YAG:Tm and YAG:Ce,Tm single crystalline films

The paper is dedicated to studying the luminescent and scintillation properties of the single crystalline films (SCF) of Tm and Tm–Ce doped Y3Al5O12 garnets grown by the liquid phase epitaxy method. We have found that the effective Tm → Ce energy transfer is observed in YAG:Ce,Tm SCF. As a result of such transfer, the scintillation light yield of YAG:Ce,Tm SCF under α-particles excitation can be large in comparison with YAG:Ce SCF counterpart

Thermoluminescent properties of undoped and Ce-doped LSO and YSO single crystals and single crystalline films scintillators

In this work the comparative analysis of thermoluminescentproperties of undoped and Ce-doped single crystals(SC) and single crystalline films (SCF) of (LSO) and(YSO) orthosilicates were performed. The SC sampleswere prepared with the Czochralski method, and SCF weregrown by the liquid phase epitaxy technique. We show that suchdifferent methods of material preparation resulted in differentthermoluminescent properties of undoped and doped LSOand YSO SC and SCF caused by the presence host defects (first ofall, oxygen vacancies) as trapping centers in SC and formation of- pair centers in SCF