Microstructure, optical, and scintillation characteristics of Pr3+ doped Lu3Al5O12 optical ceramics

Abstract

0.5, 1.0, and 5.0 at. % Pr 3+ doped Lu 3 Al 5 O 12 ͑Pr:LuAG͒ optical ceramics are fabricated and compared with Bi 4 Ge 3 O 12 ͑BGO͒ and Pr:LuAG single crystals as for their optical, luminescence and scintillation properties. Radio-luminescence intensity of the fast UV emission based on 5d 1 → 4f Pr 3+ transition reaches up to 20 times of that of BGO single crystal reference scintillator. Photoelectron yield of the best performing 0.5 at. % Pr:LuAG ceramic sample is about 1002 phels/MeV, about 30% lower than that of BGO reference sample and about 65% lower than that of Pr:LuAG single crystal. The trapping phenomena at grain boundaries and/or structural defects are proposed as the main cause of degradation of the scintillation response of the Pr:LuAG optical ceramics.

Recent R&D Trends in Inorganic Single‐Crystal Scintillator Materials for Radiation Detection

“…[ 162 ] Furthermore, the Mg 2+co-doping mentioned above was also successfully applied to LuAG:Ce ceramics and the light yield achieved exceeded that of a high-quality single crystal. [ 164,165 ] However, recently, the Pr 0.25 mol%doped ceramic LuAG prepared by the Konoshima Chemicals Co. exceeded the light-yield value of a high-quality single crystal by about 20%. [ 164,165 ] However, recently, the Pr 0.25 mol%doped ceramic LuAG prepared by the Konoshima Chemicals Co. exceeded the light-yield value of a high-quality single crystal by about 20%.…”

Stimulated Raman scattering in “garnet” Lu3Al5O12 ceramics - a novel host-materiel for Ln- and TM-lasant ions

“…The wavelength of all lines (pump line asterisked) are given in μm, their intensities are shown without correction for the spectral sensitivity of the used spectrometric system with a Si-CCD sensor. [38,39]). This work was promoted by the above-mentioned vision and is dedicated to the results of the study of nonlinear-optical χ (3) -properties of "garnet" Lu 3 Al 5 O 12 fine-grained ceramics as a perspective host-matrix for Ln-and TMlasant ions.…”

Exploration of bluish violet‐emitting phosphor Ca3Al4ZnO10:Ti4+ with enhanced emission by Ca2+ vacancies

“…So it is critical to develop mercury vapor‐pumped bluish violet phosphors. To meet this requirement, some bluish violet‐emitting phosphors such as BaSi 2 O 5 :Pb 4+ , (Lu,Y) 3 Al 5 O 12 :Pr 3+ , and SrB 4 O 7 :Eu 2+ have been prepared and studied . Unfortunately, the existing bluish violet‐emitting phosphors are suffering from serious issues: (a) the requirement of poisonous metals like lead and thallium; (b) (Lu,Y) 3 Al 5 O 12 host is hard to synthesise due to the extreme temperature requirement (generally over 1400°C); (c) SrB 4 O 7 :Eu 2+ is facing intrinsic problems like the usage of expensive rare earth ions Eu 2+ and high‐quality reductive gases.…”