In this study, we fabricated a sapphire based fiber-optic radiation sensor. To evaluate the fiberoptic\nradiation sensor, we measured the spectrum and intensity of the luminescence generated\nfrom the fiber-optic radiation sensor according to the thickness of the PMMA block by irradiation\nof gamma rays emitted from a Co-60 source. And the result was compared with the value calculated\nfrom the formula of Lambert-Beer.
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