Titanium-doped LiAlO₂ ceramics for neutron scintillation

Abstract

A series of bulk ceramic samples of titanium-doped LiAlO2 with doping concentrations of 0.05, 0.1, 0.5 and 1.0 at% were prepared using a sol-gel method. The LiAlO2:Ti samples showed emission in two spectral regions around 380 and 765 nm associated with the CT transition of Ti4+ and the d-d transition of Fe3+ impurities, respectively. The sample composition with 0.5 at% doping concentration exhibited the highest emission intensity. Furthermore, dense ceramic samples with 0.5 at% Ti-doping were prepared using spark plasma sintering. These samples exhibited intense CT luminescence of Ti4+ at 380 nm with a decay time of approximately 2.3 μs, while the emission of Fe3+ impurities was mostly suppressed.

Light Inorganic Scintillation Materials for Neutron and Charge Particle Detection

“…Analyzing the genesis of the development of the technology of inorganic scintillation materials, we can say that the awareness of the advantages of light inorganic compounds appeared more than 20 years ago [19][20][21]. A noticeable interest in them grew with the start of research on a wider set of the light materials for the purpose of creating scintillators for neutron detection [22][23][24][25]. The range of activating additives was expanded, and work was also carried out to combine several elements (Li, B, O) containing nuclei that effectively interact with neutrons [26,27].…”