Calculation of detection efficiency of the fiber-optic sensor to measure radioactive contamination using MCNP simulation

Hanyoung Joo; Arim Lee; Rinah Kim; Chan Hee Park; Joo Hyun Moon

doi:10.1117/12.2187674

23 September 2015 Calculation of detection efficiency of the fiber-optic sensor to measure radioactive contamination using MCNP simulation

Hanyoung Joo, Arim Lee, Rinah Kim, Chan Hee Park, Joo Hyun Moon

Author Affiliations +

Proceedings Volume 9577, Optical Modeling and Performance Predictions VII; 95770G (2015) https://doi.org/10.1117/12.2187674
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

In this paper, a fiber-optic radiation sensor (FORS) was developed to measure gamma rays from the radionuclides frequently found in radioactively contaminated soil. The sensing probe of the FORS was made of an inorganic (Lu,Y)₂SiO₅:Ce (LYSO:Ce) scintillator, a mixture of epoxy resin and hardener and a plastic fiber. The FORS was applied to measure gamma rays from Cs-137 source (1.1 μCi) in a disk shape. Also, MCNP simulation was performed for the same geometry as that in the experimental setup. Comparison between measurements by the FORS and MCNP simulation showed that the detection efficiency of the fiber-optic sensor was about 19.2%. The FORS is expected to be useful in measuring gamma rays from the radioactive soil at nuclear facility site.

Citation Download Citation

Hanyoung Joo, Arim Lee, Rinah Kim, Chan Hee Park, and Joo Hyun Moon "Calculation of detection efficiency of the fiber-optic sensor to measure radioactive contamination using MCNP simulation", Proc. SPIE 9577, Optical Modeling and Performance Predictions VII, 95770G (23 September 2015); https://doi.org/10.1117/12.2187674

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