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 (5): 69 doi: 10.1007/s41365-017-0222-y

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Calculation of photon shielding properties for some neutron shielding materials

A. M. El-Khayatt1,2   

  1. 1 Physics Department, College of Science, Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia
    2 Reactor Physics Department, NRC, Atomic Energy Authority, 13759 Cairo, Egypt
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A. M. El-Khayatt. Calculation of photon shielding properties for some neutron shielding materials.Nuclear Science and Techniques, 2017, 28(5): 69     doi: 10.1007/s41365-017-0222-y

Abstract:

The objective of the present study is to calculate photon shielding parameters for seven polyethylene-based neutron shielding materials. The parameters include the effective atomic number (Zeff), the effective electron density (Neff) for photon interaction and photon energy absorption, and gamma-ray kerma coefficient (kγ). The calculations of Zeff are presented as a single-valued and are energy dependent. While Zeff values were calculated via simplistic powerlaw method, the energy-dependent Zeff for photon interaction (ZPI-eff) and photon energy absorption (ZPEA-eff ) are obtained via the direct method for energy ranges of 1 keV–100 GeV
and 1 keV–20 MeV, respectively. The kγ coefficients are calculated by summing the contributions of the major partial photon interactions for energy range of 1 keV–100 MeV. In most cases, data are presented relative to pure polyethylene to allow direct comparison over a range of energy. The results show that combination of polyethylene with other elements such as lithium and aluminum leads to neutron shielding material with more ability to absorb neutron and crays. Also, the kerma coefficient first increases with Z of the additive element at low photon energies and then converges with pure polyethylene at energies greater than 100 keV.

Key words: Neutron shielding materials, Effective atomic number, Kerma coefficient, gamma-rays