Radiant ray-detector and method for producing same

摘要

A radiant ray-detector having a high resolving ability and capable of being easily produced as well as a method for producing the same are herein disclosed. The radiant ray-detector comprises a plurality of photomultiplier tubes 11 combined together and scintillator chips 1, wherein the scintillator chips 1 each is in the form of a hexahedron, more than one face thereof is mirror finished, the other faces are surface-toughened and a number of these scintillator chips 1 greater than the number of the photomultiplier tubes 11 are joined together so that the overall area of the resulting mirror surface of a group of scintillator chips 1 is approximately identical to the area of an entrance window 12 of each corresponding photomultiplier tube 11 and wherein different transmittances are imparted to individual coarse faces 4 of the scintillator chip 1 joined to those of other scintillator chips. In particular, the transmittances of these scintillator chip 1 are preferably designed such that they increase as the distance between the chips and the center of the group of chips increases. The method for producing the radiant ray-detector is characterized in that the transmittance of each joined face 4 of the scintillator chip 1 is controlled by properly selecting the particle size of abrasive grains used for finishing each coarse face.