Scintillation properties of Ba_0.20Sr_0.80Cl₂ single crystal

New scintillation crystal of a Ba_0.20 Sr_0.80Cl₂ grown by the Czochralski technique is reported. The grown crystal was cut into a size of 10×10×10 mm³. The lattice parameter of the grown crystal is a = b = c = 7.041 A˚ and the crystal structure is cubic. The luminescence and scintillation properties of the Ba_0.20Sr_0.80Cl₂ crystal were studied. The luminescent characteristics were measured with ultraviolet (UV) light and X-ray source to study the emission spectra of the crystal. Scintillation properties of the crystal such as pulse height spectra, energy resolution, α/β ratio, light output, proportionality curve, and fluorescence decay time were measured with the various radioactive γ-ray sources and α-source at room temperature. The light output of the crystal was compared with that of the CsI(Tl) crystal and the absolute light output was measured with avalanche photodiode (APD). While the light output of the crystal was less than that of the CsI(Tl), the energy resolution was approximately 6.9% for ¹³⁷Cs 662 keV γ-ray with PMT which is similar to that of the CsI(Tl) crystal for ¹³⁷Cs γ-rays.