Thermoluminescence characterization of CaB4O7:Al (CBT:Al)synthesized by solid-state method

Continuous and systematic research into calcium tetraborate (CTB) is essential due to its potential as a promising material for dosimetric applications. This study focuses on developing a novel phosphor by doping CTB with aluminum (Al) through a straightforward solid-state synthesis method. For the first time in the literature, we examine key dosimetric properties of this new material, including the glow curve structure, dose response, trapping parameters, and fading characteristics. The thermoluminescence (TL) properties of Al-doped CaB4O7 were examined using irradiation from a90Sr-90Y beta source. The TL kinetic parameters of CaB4O7 were analyzed using the computer glow curve deconvolution (CGCD) technique. The glow curve of 1 % Al-doped calcium tetraborate exhibited at least five distinct peaks, with the primary dosimetric peak observed at approximately 156 degrees C. Experimental findings demonstrate that Al-doped CTB possesses key attributes suitable for medical dosimetry, although it suffers from a significant fading issue, with a 58 % loss of signal over 7 days. This study concludes that while Al-doped CTB shows considerable promise for dosimetric applications, addressing the fading problem by incorporating additional co-dopantsis necessary.