... RAY TUBES TEPAC-WW CHEMICAL COMPOSITION MEDIAN PARTICLE SIZE (µm) P7-YX (Zn,Cd)S:Cu 12.0 P11 ... .0 P43-GY Gd2O2S:Tb 8.5 P43-GY Gd2O2S:Tb 3.5 P43-GY Gd2O2S:Tb 2.5 P44-GX ... La2O2S:Tb 7.0 P45-WB Y2O2S:Tb 7.5 P45-WB Y2O2S:Tb ... 3.5 P45-RED-ENH Y2O2S:Tb,Eu ... 5.0 P45-RED-ENH Y2O2S:Tb,Eu 3.5 P45-RED-ENH Y2O2S:Tb,Eu 2.5 P46-KG ...