Nanocomposites and nanomaterials

Time-resolved pulsed OSL readout of ceramic YAP:Mn phosphors
Ya. Zhydachevskyy1,2, S. Ubizskii1, D. Afanassyev1, A. Luchechko3, D. Sugak1, A.I. Popov4, A. Suchocki2,5
1 Lviv Polytechnic National University, Lviv, Ukraine
2 Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
3 Ivan Franko National University of Lviv, Lviv, Ukraine
4 Institute of Solid State Physics, University of Latvia, Riga, Latvia
5 Institute of Physics, University of Bydgoszcz, Bydgoszcz, Poland
E-mail: zhydach@ifpan.edu.pl

An application potential of Mn2+-doped YAlO3 (YAP:Mn) single crystals grown by the Czochralski method for thermoluminescent (TL) dosimetry of ionizing radiation has been shown previously (see [1] and references therein). The possibility for the pulsed optical stimulation (POSL) readout of the crystalline YAP:Mn has been demonstrated recently, too [2]. However, the same material fabricated by ceramics technology might be cheaper in production and more functional for applications.
The work reports results of comparative study on time-resolved pulsed optically stimulated luminescence of ceramic YAP:Mn materials prepared by different methods. In particular, the ceramics prepared from the nanocrystalline material synthesized by the solution combustion method and ones obtained by the solid-state synthesis have been studied comparatively. These studies have revealed that the TR-OSL decay of both materials features a non-exponential behavior. The Becquerel decay function with three parameters fits quite well their decay responses recorded over wide time scale and dynamic range. The mean relaxation time estimated from fitting parameters differs significantly for samples fabricated by different technologies. This difference between two types of ceramics is discussed in the framework of the trap structure of the materials.
 
1.	Ya. Zhydachevskii et al. Energy response of the TL detectors based on YAlO3:Mn crystals, Radiat. Meas. 90 (2016) 262-264.
2.	Ya. Zhydachevskii et al. Time-resolved OSL studies of YAlO3:Mn2+ crystals, Radiat. Meas. 94 (2016) 18-22.