Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (10): 153 doi: 10.1007/s41365-017-0305-9

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles    

Investigating the influence of gamma ray energies and steel fiber on attenuation properties of reactive powder concrete

Shatha D. Mohammed 1 , Wasan Z. Majeed 2 ,  Nesreen B. Naji , Nada Mahdi Fawzi 1   

  1. 1 Department of Civil, College of Engineering, University of Baghdad, Baghdad, Iraq
    2 Department of Physics, College of Science, University of Baghdad, Baghdad, Iraq
  • Contact: Nesreen B. Naji E-mail:nesreen.naji@yahoo.com
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Shatha D. Mohammed, Wasan Z. Majeed, Nesreen B. Naji, Nada Mahdi Fawzi. Investigating the influence of gamma ray energies and steel fiber on attenuation properties of reactive powder concrete.Nuclear Science and Techniques, 2017, 28(10): 153     doi: 10.1007/s41365-017-0305-9
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Abstract:

The effect of gamma ray energies and volume ratio of micro steel fiber (1 and 1.5%) on attenuation properties of reactive powder concrete (70 MPa compressive strength) was investigated. Different characteristics have been considered such as linear attenuation coefficient, mass attenuation coefficient, and half-value thickness. Sodium iodide crystal with a gamma ray spectrometer and collimated beam of gamma ray has been implemented to perform the experimental test. Three sources (Cs-137, Co- 60, and Bi-207) with energies of (0.662, 1.17 1.33, 0.569, and 1.063) MeV were adopted in the test. The results obtained indicated that mass attenuation coefficient is proportioned inversely with gamma ray energies and directly with a volume ratio of micro steel fiber. The linear attenuation coefficient and half-value thickness of the tested samples have been calculated and discussed. The obtained results showed that increasing the volume ratio of steel fiber has modified the adequacy of the reactive powder concrete as a shielding element since it increases the density and reduces the half-value thickness.

Key words: Radiation shielding, Attenuation properties, Gamma radiation, Density, Reactive powder concrete