Simulation of Void Detection System using Gamma-Ray Compton Scattering Technique


  • Mona Berlian Sari Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha No. 10, Bandung 40132,
  • Rahadi Wirawan Physics Study Program, Faculty of Mathematics and Natural Sciences, Universitas Mataram, Jalan Majapahit No. 62, Mataram 83115,
  • Abdul Waris Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha No. 10, Bandung 40132,
  • Hong Joo Kim Department of Physics, Kyungpook National University, 80 Daehak-ro buk-gu, Daegu 41566,
  • Mitra Djamal Physics Study Program, Faculty of Science, Institut Teknologi Sumatera, Jalan Terusan Jenderal Ryacudu, Way Hui, Jati Agung, Lampung Selatan 35365,



GEANT4, backscattering, detector, gamma-ray, non-destructive testing.


A simple void detection system for concrete was successfully developed using high-penetration gamma rays with Compton scattering. This research attempted to identify a void in the subsurface of a concrete volume that could not be accessed from any of the sides. Monte Carlo simulation using GEANT4 toolkit was performed to investigate the gamma-ray backscattering events. An NaI(Tl) detector was used with 60Co and 137Cs as gamma-ray sources. The void's location was successfully detected during material target scanning. Density discrepancies conduce variance of the backscattering peak produced due to the presence of a void. Compared to 60Co as the gamma-ray source, 137Cs is a better choice for application in NDT systems using Compton scattering.


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