Luminescence of alumina ceramic doped with lanthanum under medium- and high-dose irradiation

Abstract

The synthesis of La-doped alumina ceramics results in a formation of new pulsed cathodoluminescence bands and thermoluminescence peaks which associated with phases of lanthanum aluminate (LaAlO3) and lanthanum aluminium oxide (LaAl11O18). Annealing at high temperatures (up to 1600 °C) with maximum lanthanum concentration allows to create ceramics with high intensity of 510 pulsed cathodoluminescence band and 370 K thermoluminescence peak. The high intensity of new peaks thermoluminescence demonstrates the material sensitivity to ionizing radiation and the possibility of its use as ionizing radiation detectors in the case of expanding the sublinear dose recording range.