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Updated: Jun 16, 2026

Dosimetry for Cell Irradiation using Orthovoltage (40-300 kV) X-Ray Facilities
Published on: February 20, 2021
Effective atomic numbers and electron density of dosimetric material
S B Kaginelli1, T Rajeshwari, Sharanabasappa
1Department of Physics, Gulbarga University, Gulbarga - 585 106, India.
This study introduces a new method using a NaI(Tl) detector to measure X-ray mass attenuation coefficients for dosimetric materials. The findings show good agreement between experimental and theoretical values, aiding in effective atomic number and electron density calculations.
Area of Science:
- Medical Physics
- Materials Science
- Radiation Detection
Background:
- Accurate determination of mass attenuation coefficients is crucial for radiation shielding and dosimetry.
- Existing methods may be limited by scattering effects, necessitating refined techniques.
Purpose of the Study:
- To develop and validate a novel method for measuring X-ray mass attenuation coefficients.
- To apply this method to dosimetric and biological substitute materials.
- To calculate effective atomic numbers and electron densities for these materials.
Main Methods:
- Utilized a NaI(Tl) detector system with radioactive sources in a rigid geometry.
- Minimized scattering effects through spectrometer gating and absorber foil selection.
- Measured mass attenuation coefficients for elemental foils and sulfate materials.
Main Results:
- Experimental mass attenuation coefficients showed excellent agreement (1-2%) with theoretical values.
- Successfully calculated effective atomic numbers and electron densities for dosimetric materials.
- Validated the novel method for characterizing radiation interaction properties.
Conclusions:
- The developed method provides accurate mass attenuation coefficients for dosimetric materials.
- Effective atomic number and electron density calculations are reliable using this approach.
- This research contributes to improved radiation dosimetry and material characterization.
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