Scintillation and photoluminescence properties of Cs2NaY1−x Pr x Cl6 crystals

Abstract Herein, Cs 2 NaY 1− x Pr x Cl 6 crystalline scintillators have newly been fabricated and characterized. The crystals exhibited emission bands at ∼300 and ∼500 nm, which originated from the 5d–4f and 4f–4f transitions of Pr 3+ ions, respectively, and the scintillation decay time constants were 19–29 and 170–370 ns, respectively. The former was attributed to the emissions from the 5d–4f transitions of Pr 3+ ions, whereas the latter was attributed to the host materials. The light yields of these crystals were higher than those of undoped Cs 2 NaYCl 6 crystals. The Cs 2 NaY 0.4 Pr 0.6 Cl 6 crystal exhibited the highest light yield (7100 photons MeV −1 ), which is approximately four times higher than that of the undoped Cs 2 NaYCl 6 crystal (1800 photons MeV −1 ).