|About this Abstract
||Materials Science & Technology 2015
||Ceramic Optical Materials
||Transparent Ceramic Scintillators
||Nerine Cherepy, Zachary Seeley, Stephen Payne, Patrick Beck, Erik Swanberg, Brian Wihl, Steven Hunter, Scott Fisher, Peter Thelin, Daniel Schneberk, Gary Stone, Randall Thompson, Todd Stefanik, Joel Kindem
|On-Site Speaker (Planned)
We report here on the development of two new mechanically rugged, air-stable transparent ceramic scintillators: (1) Ce-doped Gd-Garnet for gamma spectroscopy, and (2) Eu-doped Gd-Lu Bixbyite for radiography. We find that intersubstitutional ions in garnet ceramics promote phase stabilization for high transparency needed to form large-size (5 in3-scale), uniform transparent ceramics. Gd-garnet ceramic scintillators offer the best energy resolution of any oxide scintillator, R(662 keV) = 3.5% (silicon photodiode readout). For radiography, the transparent ceramic scintillator, (Gd,Lu,Eu)2O3, or “GLO,” offers excellent x-ray stopping, due to its Zeff = 68 and density of 9.1 g/cm3. High transparency is achieved by minimizing the formation of secondary phases by adding Gd to the Lu2O3 structure. We will describe scaleup of GLO to 11.5” in diameter by 0.1” thick sizes. It outperforms scintillator glass for high energy radiography due to its higher light yield and better stopping.
||Planned: MS&T all conference proceedings CD