High-Fidelity Monte Carlo Simulation of Gamma-Ray Shielding Efficiency for Nuclear Security Applications Using Geant4 Toolset

Zabulonov, Yurii; Nosenko, Tetiana; Anpilova, Vitalina

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Proceedings of International Conference on Applied Innovation in IT · 2026/04/22 · Vol. 14 · Issue 2 · pp. 487–494

High-Fidelity Monte Carlo Simulation of Gamma-Ray Shielding Efficiency for Nuclear Security Applications Using Geant4 Toolset

Yurii Zabulonov, Tetiana Nosenko, Vitalina Lulianova and Yevheniia Anpilova

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Abstract

The development of AI-driven radiation detection systems is hindered by the lack of high-fidelity data representing complex shielding scenarios. Most existing datasets rely on simplified exponential attenuation models, ignoring stochastic scattering effects. This study challenges this approach by presenting a Geant4-based high-fidelity simulation of gamma-ray transport for Special Nuclear Materials (239Pu). While high-Z shielding (Lead) demonstrated predictable exponential attenuation (μ-validation error < 1.2%), our results reveal a critical anomaly in low-Z shielding (Polyethylene). We observed a significant non-monotonic "buildup effect" where the detected photon intensity increases by

Keywords

Monte Carlo Simulation Geant4 Radiation Shielding Buildup Factor Nuclear Security Special Nuclear Materials.

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