The present invention relates to a radioactive nuclide detector based on a multi-split plastic scintillator, and more particularly, to an apparatus for detecting radiation emitted from the surroundings, a plastic scintillator having a polygonal column shape by changing incident radiation into light (Polyvinyl toluene) , PVT), a reflector coupled to the outer surface of the scintillator so that the light generated through the reaction of radiation incident on the scintillator is not lost to the outside, and the light generated by the scintillator coupled to one end of the scintillator Consists of a photomultiplier tube (PMT) that collects, converts, amplifies, and outputs electrical signals, and the device composed of the scintillator, reflector, and photomultiplier tube is installed on one side of the passage and radiation emitted from a passing object or person It characterized in that it is detected. In addition, another invention of the present invention relates to a radiation detection method using a radioactive nuclide detector based on a multi-split plastic scintillator, and in detail, in the radiation detection method emitted from an object moving along a passage, (a) the incident radiation As a plastic scintillator (Polyvinyl toluene, PVT) having a polygonal column shape by changing to light, a reflector coupled to an outer surface of the scintillator so that light inside the scintillator is not lost to the outside, and coupled to one end of the scintillator A radionuclide detector consisting of a photomultiplier tube (PMT) that collects the light generated by the scintillator and converts it into an electrical signal and outputs it, is installed on one side of the passage, and (b) an object or person moving along the passage. Radiation emitted from the incident on the scintillator, (c) the radiation generated by the radiation incident on the scintillator reacts with the scintillator is collected by the photomultiplier tube, and (d) the collected by the photomultiplier tube Consisting of converting and amplifying the light into an electrical signal and outputting it, and (e) converting the electrical signal transmitted from the photomultiplier tube into data through a preset detection algorithm to check radiation emitted from an object or a person. It is characterized by being.
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