RADIOACTIVE CONTAMINATION INSPECTION DEVICE

摘要

This radioactive contamination inspection device is provided with a plastic scintillator, a light receiving element, a light guide that causes scintillation light emitted from the plastic scintillator to reach the light receiving element, and a light shielding case having an entrance window, and is further provided with a structure of thin film layers disposed between the plastic scintillator and the entrance window provided in the light shielding case, including a protective film, a light shielding film, and a reflecting film arranged in this order from the entrance window side. The side surface of the light guide is formed of a diffusely reflecting surface, the reflecting film and the plastic scintillator are arranged such that a layer of air is confined therebetween, and the surface of the reflecting film which faces the plastic scintillator is formed of a specular surface.