SOLID SCINTILLATOR AND ELECTRON BEAM DETECTOR EMPLOYING SAME

摘要

A solid scintillator comprising a sintered rare-earth oxide, the solid scintillator having an afterglow time, which is the time required for the output of light from this solid scintillator to decrease from the maximum value to 1/e the maximum value, of 200 ns or shorter. The sintered rare-earth oxide preferably has a composition represented by general formula (1). LnaXbOc:Ce (1) (In the formula, Ln is one or more elements selected from Y, Gd, and Lu; X is one or more elements selected from Si, Al, and B; and a, b, and c satisfy 1<=a<=5, 0.9<=b<=6, and 2.5<=c<=13.)