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<p>Radiation Standards Section (RSS), RSSD, Bhabha Atomic Research Centre (BARC) has already established the ISO Narrow and Wide series X-ray beam qualities; however, for applications requiring higher dose rates, dedicated high air kerma rate series is required for low energy photon fields. To achieve this objective, work was carried out to establish three high air kerma rate series, namely H-100, H-150, and H-200 at BARC. The characterization of this series was carried out with a Free-Air Ionization Chamber (FAIC) by measuring the first and second half-value layers (HVL<sub>1</sub> and HVL<sub>2</sub>), and the corresponding homogeneity coefficients. The experimentally obtained HVL<sub>1</sub> and HVL<sub>2</sub> values were found to be within ± 5% of the ISO 4037-1 specifications. These beams will serve as reference radiation fields for applications requiring high air kerma rates, like calibration of high range dosimeters and irradiation of personal dosimeters at low energy for higher doses.</p>

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Establishment of the ISO High Air Kerma Rate Series (H-series) X-ray Beam Qualities for Radiation Protection Applications

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Liji Shaiju,
  • Sunil K. Singh,
  • Aashna Gupta,
  • Soumen Dey,
  • Sneha Chandrasekhar

摘要

Radiation Standards Section (RSS), RSSD, Bhabha Atomic Research Centre (BARC) has already established the ISO Narrow and Wide series X-ray beam qualities; however, for applications requiring higher dose rates, dedicated high air kerma rate series is required for low energy photon fields. To achieve this objective, work was carried out to establish three high air kerma rate series, namely H-100, H-150, and H-200 at BARC. The characterization of this series was carried out with a Free-Air Ionization Chamber (FAIC) by measuring the first and second half-value layers (HVL1 and HVL2), and the corresponding homogeneity coefficients. The experimentally obtained HVL1 and HVL2 values were found to be within ± 5% of the ISO 4037-1 specifications. These beams will serve as reference radiation fields for applications requiring high air kerma rates, like calibration of high range dosimeters and irradiation of personal dosimeters at low energy for higher doses.