A radiation detector including a scintillator array.

摘要

A radiation detector comprises a scintillator array (11-16) for emitting scintillation light upon incidence of radiation to it and a plurality of photomultiplier tubes (21-24) optically coupled to the scintillator array for converting the scintillation light into an amplified electrical signal representing an incident position of the radiation to the scintillator array. The scintillator array comprises a plurality of scintillator elements (11-16) separated by distribution regions (31-36;71-74) for distributing the scintillation light between the other scintillator elements with a predetermined distribution ratio. The distribution regions include coupling surfaces through which the neighbouring scintillator elements are optically coupled. The coupling surfaces are roughened surface or mirror-polished to provide different transmissivities and other materials (6) may be included between them to further adjust the distribution ratio of the scintillation light transmitted from one to another of the scintillator elements. <IMAGE>