Journal Article

Scintillation Properties of Ba 3 RE(PO 4 ) 3 Single Crystals (RE = Y, La, Lu)

Yanagida, Takayuki, Ichiba, Kensei, Koshimizu, Masanori, Kawaguchi, Noriaki, Kato, Takumi, Nakauchi, Daisuke, Takebuchi, Yuma

2023

Overview

Eulytite-type Ba RE(PO ) (RE = Y, La, and Lu) single crystals were synthesized by the floating zone method, and their scintillation properties were investigated. The powder X-ray diffraction measurement revealed that the single phase of Ba RE(PO ) samples were successfully synthesized. The samples exhibited a luminescence peak due to self-trapped exciton at around 400 nm under vacuum ultraviolet and X-ray irradiation. The X-ray-induced scintillation decay time constants of the samples were several microseconds at room temperature. In the Am α-ray irradiated pulse height spectra, all the samples showed a clear full energy peak, and the absolute light yields of the Ba Y(PO ) , Ba La(PO ) , and Ba Lu(PO ) single crystals were estimated to be 960, 1160, and 1220 ph/5.5 MeV-α, with a typical error of ±10%, respectively. The scintillation light yields of the Ba RE(PO ) have been quantitatively clarified for the first time.