Scintillation properties of praseodymium doped LuAG have been investigated. The crystal is a dense (6.7 g/cm3 ) scintillator with a short decay time around 20 ns and wavelength emission spectrum peaked at 310 nm. The tested sample was 10 mm × 10 mm × 5 mm cuboid, polished on all surfaces. The dopant concentration amounts to 0.23 mol%. A light yield of 16000 ± 1600 ph/MeV was measured using high sensitivity (13.7 μ A/lmF ) Photonis photomultiplier (PMT) XP5500B. High quantum efficiency of this PMT (35%) allowed us to register 5600 ± 400phe/MeV using 12 μ s shaping time in the spectroscopy amplifier. The measured energy resolution was equal to 5.0 ±0.1 %. Response of LuAG:Pr to γ-rays was found to be proportional over wide energy range. Deviation from proportionality does not exceed 10% at 16.6 keV. This results in good intrinsic energy resolution of LuAG:Pr amounting to 3.0 ± 0.3 %, measured with 662 keV γ-rays from137Cs.
- Energy resolution
- Light Yield
- Lutetium Aluminum Garnet
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering
- Electrical and Electronic Engineering