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RADIOLOGICAL IMPACT OF USING DECORATIVE GRANITE AS AN ATTENUATOR OF IONIZING RADIATION.

Nabil M Hassan1,2, J B Lee3

  • 1Department of Physics, Faculty of Science, Zagazig University, PO Box 44519, Zagazig, Egypt.

Radiation Protection Dosimetry
|October 30, 2022
PubMed
Summary
This summary is machine-generated.

Granite exhibits acceptable radioactivity levels and effective shielding properties for ionizing radiation. Its mass attenuation coefficients are comparable to concrete, making it suitable for radiation shielding applications.

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Area of Science:

  • Nuclear Physics and Materials Science
  • Radiation Shielding and Dosimetry

Background:

  • Granite is a common aggregate in concrete construction.
  • Its natural radioactivity necessitates evaluation for radiation shielding applications.

Purpose of the Study:

  • To assess granite's suitability as a radiation shielding material.
  • To measure natural radionuclide concentrations and radiological indices in granite.
  • To determine granite's gamma-ray attenuation characteristics.

Main Methods:

  • High-purity germanium (HPGe) detector used for measuring Bq kg-1 concentrations of 226Ra, 232Th, and 40K.
  • Calculation of radiological indices: radium equivalent concentration (Raeq), external (Hex), and internal (Hin) doses.
  • Measurement of mass attenuation coefficients (cm2 g-1) for gamma rays (122-1408 keV).

Main Results:

  • Radionuclide concentrations were within acceptable ranges, with no significant radiation hazard identified.
  • Radiological indices were below international safety limits.
  • Mass attenuation coefficients ranged from 0.05 to 0.15 cm2 g-1, with half-value layers from 1.8 cm to 5.2 cm.
  • Attenuation properties align with NIST data for concrete.

Conclusions:

  • Granite samples demonstrate acceptable radioactivity levels for use in construction.
  • The measured attenuation characteristics confirm granite's efficacy as a shielding material against ionizing radiation.
  • Granite is a viable option for radiation shielding, comparable to concrete.