Composite thermoluminescent detectors based on the Ce3+ doped LuAG/YAG and YAG/LuAG epitaxial structures

LPE Growth of Composite Thermoluminescent Detectors Based on the Lu3−xGdxAl5O12:Ce Single Crystalline Films and YAG:Ce Crystals

“…As can be seen from Figure 6a, after α-particle irradiation, the main peak of the LuAG:Ce SCF/YAG:Ce SC structure was observed at 600 K. This result is consistent with the results of our previous work [17]. In accordance with the results of the work in [18], increasing the Gd content in the Lu 3−x Gd x Al 5 O 12 :Ce SCFs led to the shift of position of the main TSL peaks to the low temperature range, to 390 K in the Lu 1.5 Gd 1.5 Al 5 O 12 :Ce SCF sample (Table 2 and Figure 6d).…”

“…It is worth to note here that the mechanism of TL in the SCF samples under study was connected with the electron liberation from deeper electron traps and their subsequent recombination with the holes localized around Ce 3+ ions [17,18]. Therefore, for the registration of the TL glow curves, a "green" Schott BG 39 filter was used.…”

“…The first attempt to create a composite TL detector based on the LuAG:Ce SCF/YAG:Ce epitaxial structures was described in our previous work [17]. The observed difference (about 80 degrees) between the position of the main TSL peaks of the SC and SCF parts of the composite detector under αand β-particle excitation enabled the simultaneous registration of these particles in the mixed ionization fluxes.…”

“…Particularly, such differences can be described by ∆T = T F − T S parameter, e.g., the difference between the position of the main TL peaks, recording from the film (T F ) and substrate (T S ) parts of the composite detector ( Figure 1a). The possibility of the creation of such types of composite TL detectors for the simultaneous registration of αand β-particle excitation was shown firstly by us in [17]. This work is a continuation of the research in this direction and dedicated to the development of new types of composite TL detectors for the simultaneous registration of the different components of mixed ionization fluxes based on the SCFs of Ce 3+ -doped Lu 3−x Gd x Al 5 O 12 :Ce (x = 0-1.5) garnet and Y 3 Al 5 O 12 :Ce (YAG:Ce) SC substrates using the LPE growth method.…”

“…For this purpose, the TL properties of the epitaxial structures were examined under excitation by αand β-particles from 242 Am and 90 Sr-90 Y sources, respectively. We expected that the cation engineering of SCF content would result in more significant separation of the TL glow curves of SCFs and substrates in comparison with the prototype of such composite detectors based on the LuAG:Ce SCF/YAG:Ce SC epitaxial structure [17].…”