PHOSPHOR, AND RADIATION DETECTOR AND X-RAY CT UNIT EACH EQUIPPED THEREWITH

摘要

A phosphor represented by the general formula (L1-x-y-z-dEuxMyCezM'd)2O2S (wherein L is at least one element selected from the group consisting of Gd, La and Y, M is at least one element selected from the group consisting of Tb and Pr, M' is at least one element selected from the group consisting of Ca, Sr and Zn, and x, y, z and d are values falling in the ranges of 0.001≤x≤0.06, 0 < y≤12x10<-5>, 0 < z≤12x10<-5>, and 0≤d≤2.5x10<-4>) and manufactured by the hot hydrostatic pressing method. The phosphor has a high light permeability, a high luminous efficacy and a reduced after-glow. A radiation detector comprising a combination of this phosphor with silicon photodiode has an excellent wave length matching capability, is capable of obtaining a high luminous output, and is suitably used as an X-ray detector of an X-ray CT unit or the like.