<p>The aim of this study is to investigate the influence of cerium concentration on thermoluminescence properties of LuAG:Ce³⁺ nanopowders which is necessary for any material exhibiting a suitability for dosimetry of ionizing radiation. Varying the dopant concentration within the LuAG host induces changes in trapping centres, consequently altering the thermoluminescence characteristics. Dose–response linearity study was carried out under β-irradiation has shown an enlargement of linearity range. The repeatability study demonstrated that all samples exhibit low variation on measurements. The study of fading behaviour displayed a clear rapid loss of thermoluminescence signal, which is more convenient for short-term thermoluminescence dosimetric measurements.</p>