| 摘要 |
PURPOSE:To make measurement near an object to be measured possible and to remove the restriction of the shape on production by connecting a scintillator part and a photoelectron multiplier tube part with an optical fiber cable. CONSTITUTION:Radiant rays emitted from the inside face of a pipe A strike the surface of a cylindrical detecting material 3A to cause light emitting phenomena in it. This light is transmitted to a photoelectron multiplier tube part 5 operated by a high-voltage power source 6 without luminescence and optical loss by an optical fiber cable 4 and is amplified by an amplifier 7 and has the crest discriminated by a pulse-amplified by an amplifier 7 and has the crest discriminated by a pulse-amplitude discriminator 8 and is displayed on a scaler 9 and a counting rate meter 10 as a radiation dose. When the dose of radiant rays emitted from the outside face of the pipe is measured, the detecting material is provided on the inside face of a cylinder surrounding the pipe to transmit the light generated in the detecting material by the optical fiber cable, and the scintillator part is formed to various shapes. Since the scintillator part and the photoelectron multiplier tube part are separated from each other and the scitillator part can be carried, measurement near the object to be measured is possible.
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