Nanostructured layers of anion-defective gamma–alumina – New perspective TL and OSL materials for skin dosimetry. Preliminary results

• Thin nanostructured layers (TNL) of Al2O3 with thickness of 5 mg/cm2 were obtained.
• Its TL and OSL yields are related to contents of γ-phase and anion vacancies.
• Dose response of TNL shows linear behavior in a range of 10–5000 mGy.
• Luminescence properties of TNL are similar to such of anion-defective corundum.
• These properties are associated with centers of F-type.

Thin- layer material based on nanostructured Al2O3 of the surface density 5 mg/cm2 was obtained. The material is characterized by high OSL and TL yields comparable with those for TLD-500 which is one of the leaders among the TL and OSL detectors. The dose response, fading and dependence of TL yield on heating rate was studied. It is established that high luminescence yield of the samples under study correlates with the content of anion vacancies and γ-phase of Al2O3. The data for time-resolved luminescent spectroscopy are presented, which evidence for possible correlation between high TL and OSL activity and the F-type centers. It is noted that the material needs to be modified for successful use in dosimetry. In addition further studies to decrease the contribution of unstable (at 300 К) components to OSL and TL yields are required.