Production of a novel high strength heavy concrete using tourmaline and galena for neutron and photon radiation shielding

نویسندگان

  • A. Amiri Chemical Engineering Department, New Mexico State University, Las Cruces, New Mexico, USA
  • F. Rahmani Department of Physics, KNT university of Technology, Tehran, Iran
  • M. Baradaran-Ghahfarokhi Medical Physics and Medical Engineering Department, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
  • M.A. Mosleh Shirazi Physics Unit, Radiotherapy Department, Shiraz University of Medical Sciences, Shiraz, Iran
  • S. Jarideh Ionizing and Non-ionizing Radiation Protection Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
  • S.M.J. Mortazavi Medical Physics Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
  • S.M.R. Aghamiri Radiation Medicine Department, Shahid Beheshti University, Tehran, Iran
چکیده مقاله:

Background: High density concrete is extensively used for efficient radiation attenuation in radiotherapy rooms and nuclear reactors. Over the past eight years, some efficient galena-based concrete samples for shielding X or gamma rays was produced. The goal of this study was to produce a novel high density concrete against neutron and photon radiations using tourmaline and galena. Materials and Methods: Attenuation of gamma photons was measured using a Farmer type ionization chamber with a standard 60Co buildup cap on a Theratron 60Co therapy unit. Neutron shielding characteristics were measured by using an Am-Be source. The MCNP4C radiation transport computer code was used to investigate the effects of various shield thicknesses on the attenuation of gamma-ray photons and neutrons. Results: The concrete samples had a density of 4.0- 4.2 g/cm3. The compressive strength was 326 - 560 kg/cm2. The calculated value for Half Value Layer (HVL) of the tourmaline-galena concrete samples for 60Co gamma rays was 2.72 cm, which is much less than that of ordinary concrete (6.0 cm). The MC-derived HVL for photons with the same energy was 2.77 cm, which is in a good agreement with the experimental data. Moreover, ToGa concrete had up to 10 times greater neutron attenuation compared to that of the reference concrete. Conclusion: Tourmalin-Galena Concrete opens a new horizon in economic and efficient gamma/neutron shielding in high-energy radiotherapy bunkers, nuclear power plants, and shielding of radioactive sources.

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عنوان ژورنال

دوره 12  شماره None

صفحات  277- 282

تاریخ انتشار 2014-07

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