Synthesis and scintillation properties of Ce-doped CaZrO₃single crystals

Abstract

Undoped and Ce-doped CaZrO 3 single crystals were synthesized by the floating zone method equipped with four xenon arc lamps, and their optical and scintillation properties were evaluated. The synthesized single crystals show high transmittance at a wavelength longer than 400 nm. The excitation and emission spectra of undoped CaZrO 3 single crystal excited by vacuum ultraviolet (VUV) light show emission peaks at around 340 and 600 nm. The X-ray-induced scintillation spectra of Ce-doped CaZrO 3 single crystals exhibit a red-shift of the emission peak and concentration quenching with an increase in Ce concentration. The afterglow levels of Ce-doped CaZrO 3 are lower than those of Ce-doped CaHfO 3 crystals.

Gd Doping-Induced Luminescence Red-Shift in the CaZrO3 Perovskite for Optoelectronics

“…11 Interestingly, both are related to the defect emission in the CaZrO 3 host. Also, for lanthanoid-doped CaZrO 3 samples, the choice of Eu 3+ , 12 Tb 3+ , 13 Pr 3+ , 14 Tm 3+ , 15 Ce 3+ , 16,17 and Gd 3+ , 18,19 is also reported. Some articles on the energy transfer from Ce 3+ to Er 3+ , 20 and defect to Eu 3+ , 21 are also published.…”

Effects of Ti doping on scintillation properties of CaZrO3 single crystals

“…The light yield of approximately 1370 photons MeV −1 was lower than the common scintillators such as Bi 4 Ge 3 O 12 , 53) and Ce-doped (Lu 1−x Y x ) 2 SiO 5 . 54) On the other hand, the Ce-doped CaZrO 3 exhibited no clear photoabsorption peaks under 137 Cs gamma-ray irradiation; 34) thus, doping of Ti improved the scintillation properties of CaZrO 3 .…”

“…To date, scintillation properties of the Ce-doped CaZrO 3 single crystals have been investigated; however, the scintillation intensity was quite weak, and no clear photoabsorption peaks under 137 Cs gamma-ray irradiation were observed. 34) To enhance an emission intensity, Ti is an attractive luminescence center in CaZrO 3 . Luminescence related to Ti 4+ appears between 400 and 500 nm because luminescence centers are affected by crystal symmetry and structure.…”

Investigation of scintillation properties of Hf-based oxide materials

“…There are many investigations of the scintillation properties of single crystals synthesized by the FZ method. [31][32][33][34][35][36][37][38][39][40] The transmittance of transparent ceramics is higher than that of opaque ceramics because the number of the scattering centers such as pore and grain boundaries is small. 41) Typical synthesis methods of transparent ceramics are hot-isostatic pressing, 42) hot pressing, 43,44) and spark plasma sintering 45) methods.…”