Yazar "Turhan, M. F." seçeneğine göre listele

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  • [ X ]
    Öğe
    A study on radiation interaction parameters of boron carbide/zirconium boride composites
    (Springer Heidelberg, 2025) Turhan, M. F.; Tursucu, A.; Ogul, H.; Kacal, M. R.; Polat, H.; Colak, E.; Yurtcan, S.
    In this study, photon interaction parameters such as radiation protection efficiency (RPE), total mass attenuation coefficient (mu/rho), linear attenuation coefficients (mu), half value layers (HVL), tenth value layers (TVL), mean free paths (MFP), effective atomic numbers (Z(Eff)) and effective electron densities (N-Eff) were experimentally investigated for the BCZrB-0, BCZrB-10, BCZrB-20, BCZrB-30, BCZrB-40 and BCZrB-50 in the energy range from 59.5 keV to 1332.5 keV. In the experiment, HPGe detector and Am-241 (59.5 keV), Ba-133 (81 keV, 276.4 keV, 302.9 keV, 356 keV and 383.9 keV), Na-22 (511 keV and 1274.5 keV), Cs-137 (661.7 keV), and Co-60 (1173.2 keV and 1332.5 keV) radioactive point sources were used. Experimental results compared with results of the WinXCOM, GEANT4 simulation code and FLUKA simulation code. Energy absorption build-up factors (EABF) and exposure build-up factors (EBF) were calculated with G-P fitting method in the energy region 0.015 MeV <= E <= 15 MeV. Kerma relative to air values were investigated in the energy region 0.001 MeV <= E <= 20 MeV. Effective removal cross section, total macroscopic cross section and number of transmitted neutron values were defined for composites. The agreement between experimental and WinXCOM program, between experimental and GEANT 4 simulation codes and between experimental and FLUKA simulation codes of gamma-ray interaction parameters are < 5.1%, < 6.5% and < 5%, respectively. All of the results are compatible with each other and BCZrB-50 is a good gamma-ray radiation absorber in the studied composites and BCZrB-0 is the best neutron absorber in the studied composites.
  • [ X ]
    Öğe
    Impact of lead(II) iodide on radiation shielding properties of polyester composites
    (Springer Heidelberg, 2020) Akman, F.; Ogul, H.; Kacal, M. R.; Polat, H.; Dilsiz, K.; Turhan, M. F.
    This paper investigates the radiation shielding properties, such as linear and mass attenuation coefficients, half and tenth value layers, effective atomic number and electron density, and radiation protection efficiency as a function of photon energy, of a new composite, PbI2-doped polyester. The mentioned polyester composite was prepared with different proportions of lead(II) iodide (5% increments between 5 and 20%) so that impact of the dopant amount on radiation shielding could be properly analyzed. The prepared composites were tested in 22 different energies in the energy range of 59.5-1408.0 keV with the use of HPGe detector and eight radioactive point sources. The obtained results were further validated by comparing the results of XCOM computer program, and negligible discrepancies were observed. It was observed that PbI2 (20%) composite is more effective gamma radiation shielding material than other produced composites. In light of this information, it can be said that the shielding efficiency increases with increasing lead(II) iodide amount.