Undoped and Cu +-doped lithium aluminate LiAlO 2 singe crystals have been grown using micro-pulling down (μ-PD) technique. After cutting and polishing, optical properties and scintillation characteristics of the crystals were examined. From the transmittance measurements, Cu +-doped crystal showed absorption band around 270 nm, which is corresponding to the transition between Cu + 3d 10 and 3 d 9 4s states. Ultra violet emission peak appeared around 360 nm under 270 nm excitation. The emission decay time was calculated to be about 17.3 μ s. 241 Am 5.5 MeV alpha-ray excited radioluminescence spectra exhibited intense luminescence band at 360 nm due to the Cu +3d 94s-3d 10 transitions. By the pulse height spectra 252 Cf neutron source excitation, the scintillation light output of Cu +-doped LiAlO 2 was found to be about 8700 ph/n.
- Crystalline materials
- inorganic compounds
- solid scintillation detectors
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering
- Electrical and Electronic Engineering