RADIATION THREE-DIMENSIONAL POSITION DETECTOR

摘要

PURPOSE:To enhance the detection sensitivity of radioactive rays, by constituting a monolithic scintillator unit by parallelly arranging two multilayer scintillators and inserting a thin transparent plate partially containing a reflecting material between both scintillators to bond all of them. CONSTITUTION:A radiation three-dimensional position detector is constituted of multilayer scintillators each formed by laminating a plurality of scintillator cells 1 and light receiving elements 2 are optically bonded to the bottom surfaces of the multilayer scintillators. Thin transparent plates 3 are inserted between the scintillator cells 1 and partially replaced with a reflecting material 4 between the multilayer scintillators. Since all of the elements mentioned above are bonded to form a monolithic scintillator unit and two light receiving elements are respectively bonded to the bottom surfaces of the multilayer scintillators optically, difference is generated between the light path lengths from the scintillator cells emitting light to the light receiving elements and difference is generated between the output peaks of two light receiving elements corresponding to said difference. Therefore, by taking the ratio of the output signals obtained from two light receiving elements, the detection position of radioactive rays can be judged with good accuracy.