Scintillation properties of CsSrX3:Eu2+ (CsSr1−yEuyX3, X = Cl, Br; 0 ≤ y ≤ 0.05) single crystals grown by the Bridgman method

•The scintillation light yield of CsSr0.95Eu0.05Cl3 is 33,400 photons per MeV.•For CsSr0.95Eu0.05Br3 this parameter is equal to 31,300 photons per MeV.•Decay time of scintillation (μs) is 2.7 for chloride sample and 2.5 for bromide one.

The single crystals of CsSr1−yEuyCl3 and CsSr1−yEuyBr3 (0 ≤ y ≤ 0.05) grown by the Bridgman method have been investigated for their scintillation properties. The radioluminescence spectra of the crystals demonstrated a narrow band at 400–500 nm which peak position shifts continuously toward larger wavelength as the Eu2+ concentration increases. The scintillation light yield achieves maximal value of 33,400 ± 1700 photons per MeV with energy resolution of 11.5% at CsSr0.95Eu0.05Cl3 and 31,300 ± 1600 photons per MeV with energy resolution of 9% at CsSr0.95Eu0.05Br3. The decay times at room temperature are 2.7 ± 0.2 μs and 2.5 ± 0.2 μs, respectively.