Patent ID: 9696436
Date: 2017-07-04
CPC Classifications: G01T

Claim:
1. A scintillator crystal comprising: a plurality of first crystal phases; and a second crystal phase covering respective side surfaces of the first crystal phases, wherein each of the plurality of first crystal phases is a columnar crystal that includes a perovskite type oxide material containing both Gd and Tb, and emits light by being excited by radiation, wherein the second crystal phase includes alumina, and wherein, assuming that a, b, and c respectively represent Gd, Al, and Tb in an element ratio among them that are contained in a total amount of substance of the scintillator crystal, the element ratio is within a range defined by (a, b, c)=(0.174, 0.795, 0.031), (0.207, 0.756, 0.037), (0.213, 0.775, 0.012), and (0.194, 0.795, 0.011) as vertexes in a ternary composition diagram.