Scintillation Properties of LuAG:Ce, YAG:Ce and LYSO:Ce Crystals for Gamma-Ray Detection

X-ray imaging of subsurface dynamics in high-Z materials at the Diamond Light Source

“…26 As shown, the LuAG:Ce crystals used in this work also suffer from a long-lived decay component, which results in significant light output over the hybrid bunch gap, effectively dominating the signal around the single bunch. A preliminary survey of alternative scintillator materials suggests a dramatic improvement might be realised by moving to either LYSO or LuI 3 , with the contribution due to ghosting dropping to only 2% in the former case.…”

“…Comparison with the hybrid X-ray bunch structure (shown along the axis) reveals clear deviation from this ideal behaviour resulting in smearing of the 500 ns gap and single bunch by an extended period of build-up and decay. To better understand the source of this smearing, the scintillator emission was modelled through a convolution analysis using the emission decay response of LuAg:Ce measured by Chewpraditkul et al 26 The calculated result, shown overlaid, reproduces the same features as the measurements, however it indicates a more persistent background resulting in a minimum intensity within the gap of ∼0.75 relative to peak. This is a direct consequence of the known long-lived decay behaviour arising from delayed charge carrier recombination in this crystal.…”

New Tl 2 LaBr 5 : Ce 3+ crystal scintillator for γ-rays detection

“…The obtained 25 ns decay constant is assigned to the life time of 5d excited state of Ce 3+ ion. Moreover, the fast scintillation decay time constant revealed that direct electron-hole at luminescence center is possible in TLB: Ce 3+ single crystal [18]. The effect of Ce 3+ -concentration on the decay time constants of TLB implies that the excitation energy is efficiently transferred from the host lattice to Ce 3+ ion.…”

A Monte Carlo study for optimizing the detector of SPECT imaging using a XCAT human phantom

“…On the other hand, YAG:Ce has the ability to detect x-rays and low energy gamma-ray photons. Also, Lutetium aluminum garnet activated by cerium (LuAG:Ce) has higher density than YAG:Ce and faster decay time than BGO crystal [6]. Cerium-activated lanthanum bromide (LaBr 3 ) has a good energy resolution and low decay time, high temperature stability also at room temperature [5][6][7].…”