Cerium Bromide - Methanol Adduct, CeBr_3(CH_3OH)_4: A Novel Lanthanide Halide Complex as Inorganic Scintillator

摘要

A novel lanthanide halide complex with formula CeBr_3(CH_3OH)_4 was grown from anhydrous methanol solution into large single crystals. The radioluminescence spectrum of CeBr_3(CH_3OH)_4 exhibits a broad band peaking in the near-UV due to Ce~(3+) 5d → 4f emission. The emission is shifted to shorter wavelengths when compared to the emission of single crystal CeBr_3. The light yield of CeBr_3(CH_3OH)_4 was estimated to be about 5,000 ph/MeV when compared to a BGO crystal. The energy resolution is 15% at 662 keV. Scintillation decay time spectra under gamma-ray excitation show a fast 33 ns decay component.