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<p>In medical and nuclear plants as well as industrial plants, radiation shielding materials are necessary and concrete composites are popular because they are structurally stable and economically viable. In this paper, the attenuation characteristics of barite-based concrete composites using gamma-rays were experimentally measured and compared with theoretical values. Five concrete samples with the thickness 1–5&#xa0;cm, using 32.4% barite (BaSO<sub>4</sub>) as high-density aggregate, were prepared and irradiated with 1.25&#xa0;MeV gamma photons of a <sup>60</sup>Co source. The radiation sent through the ionization chamber was measured with the help of an ionization chamber-electrometer system and linear attenuation coefficient (µ) and mass attenuation coefficient (µ/ρ) were calculated. The experiment results indicated that µ depended on sample thickness and density depending on small differences of compaction, and µ/ρ was relatively constant across all samples. The experimental mass attenuation coefficients were found to be 0.0533–0.0548&#xa0;cm<sup>2</sup>/g with high agreement to the theoretical values in the NIST XCOM database with the mean deviation of 0.67% and RMSE of 1.16. The half-value and tenth-value layers (HVL and TVL) were 4.32510&#xa0;cm and 14.341695&#xa0;cm respectively, which represented successful gamma attenuation. The optimized specimen was characterized mechanically and gave a compressive strength of 19.58&#xa0;MPa and a Young modulus of 43.5 Gpa which showed sufficient structural performance in shielding. These findings prove barite addition as a successful technique in improving gamma attenuation and still achieving acceptable mechanical properties. These results are experimentally proven to give the use of barite-based concrete as viable shielding media to regulated radiation atmosphere.</p>

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Experimental and theoretical evaluation of gamma ray attenuation in barite based concrete using XCOM validation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月8日

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  • Sajjad Ali,
  • Salar Ahmad,
  • Wadah Hmood Ahmed Mohsen,
  • Ikram Ullah,
  • Ibrahim Mahariq

摘要

In medical and nuclear plants as well as industrial plants, radiation shielding materials are necessary and concrete composites are popular because they are structurally stable and economically viable. In this paper, the attenuation characteristics of barite-based concrete composites using gamma-rays were experimentally measured and compared with theoretical values. Five concrete samples with the thickness 1–5 cm, using 32.4% barite (BaSO4) as high-density aggregate, were prepared and irradiated with 1.25 MeV gamma photons of a 60Co source. The radiation sent through the ionization chamber was measured with the help of an ionization chamber-electrometer system and linear attenuation coefficient (µ) and mass attenuation coefficient (µ/ρ) were calculated. The experiment results indicated that µ depended on sample thickness and density depending on small differences of compaction, and µ/ρ was relatively constant across all samples. The experimental mass attenuation coefficients were found to be 0.0533–0.0548 cm2/g with high agreement to the theoretical values in the NIST XCOM database with the mean deviation of 0.67% and RMSE of 1.16. The half-value and tenth-value layers (HVL and TVL) were 4.32510 cm and 14.341695 cm respectively, which represented successful gamma attenuation. The optimized specimen was characterized mechanically and gave a compressive strength of 19.58 MPa and a Young modulus of 43.5 Gpa which showed sufficient structural performance in shielding. These findings prove barite addition as a successful technique in improving gamma attenuation and still achieving acceptable mechanical properties. These results are experimentally proven to give the use of barite-based concrete as viable shielding media to regulated radiation atmosphere.