Scintillation Characterization of Rb $_{2}$ LiCeCl $_{6}$ Single Crystal

The scintillation properties of Rb₂LiCeCl₆, a new scintillation material of the elpasolite family, are presented. Under X-ray excitation, broad emission band between 350 to 401 nm wavelengths is obtained. Such emission is attributed to cerium ion. The energy resolution of 662-keV photopeak measured with Rb₂LiCeCl₆ crystal is found to be 7.9% (FWHM). A maximum light yield of ~ 23 100 ph/MeV is measured. Under γ-ray excitation, Rb₂LiCeCl₆ single crystal showed two exponential decay time components. Comparison of X-ray excited emission and pulse height spectra of Rb₂LiCeCl₆ and Rb₂LICeBr₆ are also presented. Non-proportionality and energy resolution as a function of γ-rays energies are presented. This material is highly hygroscopic.