Monte Carlo Modeling of Gamma Ray Backscattering for Crack Identification in the Aluminum alloy Plate

International Conference on Advances in Nuclear Science and Engineering 2015

Wirawan, Rahadi^1 ; Waris, Abdul^2 ; Djamal, Mitra^2 ; Gunawan, H.^2 ; Kim, H.J.^3

Prodi Fisika, FMIPA, Universitas Mataram, Jl. Majapahit 62, Mataram

83125, Indonesia^1

Prodi Fisika, FMIPA, Institut Teknologi Bandung, Jl. Ganesa 10, Bandung

40132, Indonesia^2

Radiation Science Research Institute, Department of Physics, KYUNGPOOK National University, Daegu

702-701, Korea, Republic of^3

关键词: Absorbed energy;    Backscattering energy;    Crack identification;    Crack model;    Crack width;    Gamma source;    Monte Carlo model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/799/1/012010/pdf
DOI  :  10.1088/1742-6596/799/1/012010

来源: IOP

【 摘 要 】

A Monte Carlo simulation study has been conducted of the Cs-137 gamma ray backscattering in the aluminum alloy plate. This simulation was performed in order to identify the existence of the crack in the aluminum alloy plate, the correlation between the backscattering peak and the crack width. We are able to analyze the absorbed energy distribution in the NaI(Tl) scintillation detector. For the experimental measurement, we are using 5 μCi of a Cs-137 gamma source and 2 in. x 2in. NaI(Tl) scintillation detector with the PMT. The aluminum alloy dimension is about 8 cm x 6 cm x 1 cm. The crack model is represented by the slit with the varying width (1 mm, 2 mm, 4 mm, and 6 mm). The existence of a crack is identified by the decreasing intensity of the gamma backscattering energy peak. These predicted results have a good agreement with the experimental measurement.