Optical and Scintillation Properties of Cs LiYCl Ce and Cs LiYCl Pr Crystals

In this paper we report on the optical and scintilla- tion properties of Cs LiYCl Ce and Cs LiYCl Pr crystals. Crystals of Cs LiYCl doped with different Ce and Pr concentrations were grown and studied under optical, X-ray, gamma ray, and thermal neutron excitation. These scintillators ex- hibit core-valence and self-trapped exciton luminescence in addi- tion to fast emission from Ce and Pr . Efficient thermal neu- tron detection was observed for both scintillators. The position of the neutron peak in the pulse height spectra was found at about 5 times the channel number of the position of the Cs 662 keV gamma peak. Index Terms—Cs2LiYCl6, scintillation detectors, scintillators, thermal neutron detection.