C. P. Allier, E. V. D. van Loef, P. Dorenbos, R. W. Hollander, C. W. E. van Eijk, K. W. Krämer and H. U. Güdel
Readout of a LaCl₃(Ce³⁺) scintillation crystal with a large area avalanche photodiode
Nucl. Instr. and Methods Phys. Res. A 485, 547-550 (2002)                 

Abstract: A high-resolution gamma-ray detector consisting of an 8 mm diameter and 5 mm thick LaCl₃(Ce³⁺) scintillation crystal coupled to a 16 mm diameter APD from Advanced Photonix Inc is presented. The energy resolution R obtained at 662 keV is about 3.7% (full-width at half maximum). The low intrinsic resolution of about 2%, the high light yield of the crystal (46000±5000 photons per MeV) and the high quantum efficiency of the avalanche photodiode make this gamma-ray detector an excellent choice for applications were a high energy resolution is required.