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An enhanced differential evolution-based inverse radiation transport model for identification of unknown shielding layer thicknesses with gamma-ray spectrum

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Abstract

Identifying the geometric information of an object by analyzing the detected radiation fields is an important problem for national and global security. In the present work, an inverse radiation transport model, based on the enhanced differential evolution algorithm with global and local neighborhoods (IRT-DEGL), is developed to estimate the unknown layer thickness of the source/shield system with the gamma-ray spectrum. The framework is briefly introduced with the emphasis on handling the enhanced differential evolution algorithm. Using the simulated gamma-ray spectra, the numerical precision of the IRT-DEGL model is evaluated for one-dimensional source systems. Using the detected gamma-ray spectra, the inverse investigations for the unknown thicknesses of multiple shielding layers are performed. By comparing with the traditional gamma-ray absorption method, it is shown that the IRT-EDGL model can provide a much more accurate result and has great potential to be applied for the complicated systems.

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Acknowledgements

The authors would like to acknowledge Ming-Cong Lan, Xiao-Jun Dang and Wei-Bo He for the discussions during the whole work.

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Authors and Affiliations

  1. Institute of Materials, China Academy of Engineering Physics, Jiangyou, Mianyang, 621907, China

    Ying Chen, Lian-Ping Zhang, Meng-Fu Wei, Lun-Qiang Wu & Jian-Min Hu

  2. Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang, 621908, China

    Xue Sai

Authors
  1. Ying Chen
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  2. Lian-Ping Zhang
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  3. Xue Sai
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  4. Meng-Fu Wei
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  5. Lun-Qiang Wu
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  6. Jian-Min Hu
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Corresponding author

Correspondence to Ying Chen.

Additional information

This work was supported by the CAEP foundation for Development of Science and Technology (No. 2015B0103014) and National Natural Science Foundation of China (No. 11605163).

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Chen, Y., Zhang, LP., Sai, X. et al. An enhanced differential evolution-based inverse radiation transport model for identification of unknown shielding layer thicknesses with gamma-ray spectrum. NUCL SCI TECH 28, 84 (2017). https://doi.org/10.1007/s41365-017-0231-x

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  • DOI: https://doi.org/10.1007/s41365-017-0231-x

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