Laser-Sintered Bismuth Germanate Ceramics as Scintillator Devices
作者： Zélia Soares Macedo , Ronaldo Santos Silva , Mário Ernesto Giroldo Valerio , André Luiz Martinez , Antonio Carlos Hernandes
DOI: 10.1111/J.1551-2916.2004.01076.X
关键词:
摘要: We have investigated the potential use of Bi4Ge3O12 (BGO) laser-sintered ceramics in scintillator devices for radiation detection. Relevant results from characterization made during ceramic processing are presented, such as particle size analysis, X-ray diffraction studies, and thermal analysis. Furthermore, we compared microstructure, relative density, thermoluminescent (TL) emission, transparency degree bodies sintered by CO2 laser heating with a reference set an electrical furnace, also single crystals grown Czochralski technique. It was observed that BGO presented density 98% (±2%), better pore shrinkage, larger grains, light transmission intensity 1.5 times higher than furnace. The TL curves all samples irradiated UV β−rays peaks at 75°, 102°, 143°C, provided strong indication intergrain defects same nature bulk do not contribute new traps temperature range studied. areas total emission after β irradiation were 6,0:4,4:1 ceramic, crystal, respectively. For samples, this relation 7,1:4,7:1. From these results, concluded amount charge lower conventionally thus having radioluminescence yield.
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