RADIATION DIRECTIVITY DETECTOR, AND RADIATION MONITORING METHOD AND DEVICE

摘要

A radiation directivity detector for detecting the direction of incidence of radiation comprises scintillators (41, 42, 43) (101, 102, 103) made of the same material and arranged in a circumferential direction in such a way that they cast their shadows on one another with respect to radiation incident in a circumferential direction and overlap with one another, and the light emitted from one scintillator does not enter any other scintillator and light-receiving elements (51, 52, 53) (111, 112, 113) having light-receiving surfaces optically joined to the respective scintillators. Since the combination of the proportion of the radiation directly entering one scintillator and the proportion of the radiation indirectly entering the scintillator because of the block of another scintillator vary with the circumferential incidence direction, the weight of the detector is decreased, the efficiency of radiation detection is improved, information detected by measurement over a half or the full circumferential length is made more detail, and the operability is improved by simplified setting.