Ionizing radiation attenuation competences of gallium germanate-tellurite glasses utilizing MCNP5 simulation code and Phy-X/PSD program

Aim: The aim of this study is to find an optimum material to protect garment for protection against 99Tcm radionuclide.Materials and Methods: Monte Carlo simulation code was applied to investigate radiation attenuation of 13 shielding materials including: Ba, gray Sn, white Sn, Sb, Bi, Bi2O3, BaSO4, Sn/W, Sb/W, Pb and W with thicknesses of 0.5 and 1 mm to determine an optimum protective garment material in nuclear medicine against 99Tcm. Furthermore, the dose enhancement on the staff body was investigated for shielding materials such as tungsten and lead.Results: The findings of the simulations show that the maximum and minimum attenuation obtained with thicknesses of 1 mm W and 1 mm BaSO4 were 96.46% and 14.2%, respectively. The results also demonstrate that tungsten does not cause any dose enhancement on staff body but this is not true for lead. Tungsten provides the highest radiation attenuation without dose enhancement on the body of staff.Conclusion: Among materials evaluated, tungsten is the optimum material and it can be applied for the design of protective garment for nuclear medicine staff against 99Tcm.

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Transmission, buildup factors, and photon shielding capacity of vanadium reinforced tellurite glasses

10.21203/rs.3.rs-161281/v1 ◽

2021 ◽

Author(s):

Yasser Rammah ◽

F.I. El-Agawany ◽

M.S. Gaafar ◽

S.Y. Marzouk ◽

K.A. Mahmoud ◽

...

Keyword(s):

Ionizing Radiation ◽

Dose Rate ◽

Radiation Shielding ◽

Low Energy ◽

Tellurite Glasses ◽

Gamma Photon ◽

Medical Area ◽

Glass Thickness ◽

Buildup Factors ◽

Semiconductor Glasses

Abstract The ionizing radiation shielding parameters of (90-y)TeO2-yV2O3-5CaO-5Na2O (TVCN): y = 5–20 mol% semiconductor glasses were investigated. The avarage track lengths of photons with different energies (0.015- 15 MeV) in the TVCN-glasses were simulated via MCNP-5 code, then the corresponding LAC were computed. Based on LAC values, the MACs were calculated and compared with values which obtained via XCOM software. The highest LAC achieved for low energy (0.015 MeV) and reduced from 199.549 to 169.891 cm− 1, while the lowest values achieved for gamma photon with higher energies and reduced from 0.188 to 0.161 cm− 1 with replacment of TeO2 compound by V2O5. The highest (I/Io) achieved for TVCN20 glasses and decreased from 0.703 to 0.172., while the lowest (I/Io) performed for TVCN5 glasses and decreased from 0.680 to 0.145 for glasses thickness varied between 1 and 5 cm. The thinner HVL was achieved for TVCN5 and increases from 0.003 to 3.684 cm, while the thicker HVL was achieved for TVCN20 and increases from 0.004 to 4.293 cm. The highest dose rate was recorded in the presence of theTVCN20 glasses and varied between 5.680 and 23.210 µSv/hr, while the lowest dose rate recorded in the presence of the TVCN5 glasses and varied between 4.807 and 22.448 µSv/hr for glass thickness varied in range between 1–5 cm. The highest values of the Zeff was recorded for glasses TVCN5 and varied between 21.209 and 50.402, while the lowest Zeff achieved for TVCN20 and varied between 18.489 and 40.479. The calculated buildup factors (EBF and EABF) reach maximum values for glasses TVCN5 while the lowest EBF and EABF achieved for glasses TVCN20. Therefore, the glasses TVCN5 have a higher ability to attenuate the incident gamma photons. Thus, the TVCN-glasses can be applied in various radiation shielding applications in medical area.

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