WITHDRAWN: Assessment of ionizing radiation attenuation features of zirconolite silicate glasses using XCOM and FLUKA simulation code

2020 ◽  
pp. 412002
Author(s):  
Hakan Akyildirim ◽  
E. Kavaz ◽  
F.I. El-Agawany ◽  
Y.S. Rammah
Keyword(s):  
Ionizing Radiation ◽  
Silicate Glasses ◽  
Simulation Code ◽  
Radiation Attenuation

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

2020 ◽  
Vol 46 (14) ◽  
pp. 22766-22773 ◽  
Author(s):  
Y.S. Rammah ◽  
F.I. El-Agawany ◽  
A.M. Abu El Soad ◽  
E. Yousef ◽  
I.A. El-Mesady
Keyword(s):  
Ionizing Radiation ◽  
Tellurite Glasses ◽  
Simulation Code ◽  
Radiation Attenuation

scholarly journals Evaluation of the influence on the variation of the mixture of sand, cement and barium sulphate in the ionizing radiation attenuation result

2021 ◽  
Vol 1826 (1) ◽  
pp. 012058
Author(s):  
CHS Sousa ◽  
RM Vasconcelos ◽  
GS Araújo ◽  
LGP Filho ◽  
RG Azevedo ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Barium Sulphate ◽  
Radiation Attenuation

Evaluation of optical features and ionizing radiation shielding competences of TeO2–Li2O (TL) glasses via Geant4 simulation code and Phy-X/PSD program

2020 ◽  
Vol 108 ◽  
pp. 110394
Author(s):  
R. El-Mallawany ◽  
Y.S. Rammah ◽  
F.I. El-Agawany ◽  
Sandro Marcio Lima ◽  
C. Mutuwong ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Radiation Shielding ◽  
Geant4 Simulation ◽  
Simulation Code

scholarly journals An Investigation to Determine an Optimum Protective Garment Material in Nuclear Medicine

2018 ◽  
Vol 8 (4Dec) ◽  
Author(s):  
R Parvaresh ◽  
A Haghparast ◽  
K Khoshgard ◽  
M Jalili ◽  
M T Eivazi ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Nuclear Medicine ◽  
The Body ◽  
Dose Enhancement ◽  
Simulation Code ◽  
Radiation Attenuation ◽  
Optimum Material ◽  
Protective Garment

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.

Radiation shielding features of zirconolite silicate glasses using XCOM and FLUKA simulation code

2020 ◽  
Vol 545 ◽  
pp. 120245 ◽  
Author(s):  
Hakan Akyildirim ◽  
E. Kavaz ◽  
F.I. El-Agawany ◽  
E. Yousef ◽  
Y.S. Rammah
Keyword(s):  
Radiation Shielding ◽  
Silicate Glasses ◽  
Simulation Code

Direct observations of radiation-enhanced transformations in glass

1983 ◽  
Vol 41 ◽  
pp. 354-355
Author(s):  
J. F. DeNatale ◽  
D. G. Howitt
Keyword(s):  
Glass Matrix ◽  
Diffusion Mechanism ◽  
Bubble Formation ◽  
Silicate Glasses ◽  
Phase Decomposition ◽  
Direct Observations ◽  
Thin Foils ◽  
Oxygen Bubble ◽  
Electron Energy Loss ◽  
Kinetics Of

The electron irradiation of silicate glasses containing metal cations produces various types of phase separation and decomposition which includes oxygen bubble formation at intermediate temperatures figure I. The kinetics of bubble formation are too rapid to be accounted for by oxygen diffusion but the behavior is consistent with a cation diffusion mechanism if the amount of oxygen in the bubble is not significantly different from that in the same volume of silicate glass. The formation of oxygen bubbles is often accompanied by precipitation of crystalline phases and/or amorphous phase decomposition in the regions between the bubbles and the detection of differences in oxygen concentration between the bubble and matrix by electron energy loss spectroscopy cannot be discerned (figure 2) even when the bubble occupies the majority of the foil depth.The oxygen bubbles are stable, even in the thin foils, months after irradiation and if van der Waals behavior of the interior gas is assumed an oxygen pressure of about 4000 atmospheres must be sustained for a 100 bubble if the surface tension with the glass matrix is to balance against it at intermediate temperatures.

Radiation-induced surface decomposition

1983 ◽  
Vol 41 ◽  
pp. 368-369
Author(s):  
M. L. Knotek
Keyword(s):  
Ionizing Radiation ◽  
Atomic Structure ◽  
Chemical Bonding ◽  
Neutral Species ◽  
Radiation Induced ◽  
Physical And Chemical ◽  
Surface Decomposition ◽  
The Relationship ◽  
Electron And Photon ◽  
Surface Bond

Modern surface analysis is based largely upon the use of ionizing radiation to probe the electronic and atomic structure of the surfaces physical and chemical makeup. In many of these studies the ionizing radiation used as the primary probe is found to induce changes in the structure and makeup of the surface, especially when electrons are employed. A number of techniques employ the phenomenon of radiation induced desorption as a means of probing the nature of the surface bond. These include Electron- and Photon-Stimulated Desorption (ESD and PSD) which measure desorbed ionic and neutral species as they leave the surface after the surface has been excited by some incident ionizing particle. There has recently been a great deal of activity in determining the relationship between the nature of chemical bonding and its susceptibility to radiation damage.

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