scholarly journals Fabrication of Novel (Biopolymer Blend-Lead Oxide Nanoparticles) Nanocomposites: Structural and Optical Properties for Low-Cost Nuclear Radiation Shielding

2019 ◽  
Vol 64 (2) ◽  
pp. 157 ◽  
Author(s):  
A. Hashim ◽  
K.H.H. Al-Attiyah ◽  
S. F. Obaid
Keyword(s):  
Optical Properties ◽  
Lead Oxide ◽  
Optical Constants ◽  
Low Cost ◽  
Radiation Shielding ◽  
Nuclear Radiation ◽  
Oxide Nanoparticles ◽  
Energy Band Gap ◽  
Structural And Optical Properties ◽  
Attenuation Coefficients

Low-cost polymer nanocomposites prepared for the nuclear radiation shielding have highly linear attenuation coefficients, light weight, and elastic, good mechanical, optical, and dielectric properties. The carboxymethyl cellulose (CMC)–polyvinyl pyrrolidone (PVP) polymeric blend is prepared with concentrations: 60 wt.% CMC and 40 wt.% PVP. The lead oxide nanoparticles are added to the CMC–PVP blend with different concentrations: 0, 2, 4, 6, and 8 wt.%. The structural and optical properties of (CMC–PVP–PbO2) nanocomposites are studied. The results show that the absorbance of the (CMC–PVP) blend increases and the energy band gap decreases, as the concentration of PbO2 nanoparticles increases. The optical constants of the (CMC–PVP) blend increase with the concentration of lead oxide nanoparticles. The (CMC–PVP–PbO2) nanocomposites have highly linear attenuation coefficients for gamma radiation.

scholarly journals Preparation and Characterization of (Biopolymer blend-PbO2) Nanocomposites For Gamma Ray Shielding Applications

2018 ◽  
Vol 26 (6) ◽  
pp. 31-44
Author(s):  
Abdulameer Khalaf Arat
Keyword(s):  
Electrical Conductivity ◽  
Lead Oxide ◽  
Optical Constants ◽  
Gamma Ray ◽  
Polyvinyl Pyrrolidone ◽  
Oxide Nanoparticles ◽  
Energy Band Gap ◽  
Attenuation Coefficients ◽  
Casting Technique

In the present work, nanocomposites of polyvinyl pyrrolidone (PVP), carboxymethyl cellu- lose (CMC) and lead oxide nanoparticles (PbO2) have been prepared to use for gamma ray shielding applications. The nanocomposites have been prepared by casting technique. The lead oxide nanoparticles were added to the mixture of (PVP 55 wt.% and CMC 45 wt.%) with different concentrations are (0,1.5,3 and 4.5) wt.%. The D.C electrical conductivity and optical properties of nanocomposites were studied. The experimental results showed that the D.C electrical conductivity increases with increase the lead oxide nanoparticles concentrations. The absorbance and optical constants increase with the increase of PbO2 concentrations but the energy band gap decreases with the increase of PbO2 concentrations. The results of (polyvinyl pyrrolidone, carboxymethyl cellulose and lead oxide nanoparticles) nanocomposites application for gamma ray shielding showed that the (PVP-CMC-PbO2) nanocomposite have high linear attenuation coefficients for Cs-137 gamma ray sources.

scholarly journals Nuclear Radiation Shielding Characteristics of Some Natural Rocks by Using EPICS2017 Library

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4669
Author(s):  
Mohammed Sultan Al-Buriahi ◽  
M. I. Sayyed ◽  
Rashad A. R. Bantan ◽  
Yas Al-Hadeethi
Keyword(s):  
Building Materials ◽  
Low Cost ◽  
Olivine Basalt ◽  
Effective Atomic Number ◽  
Correlation Factor ◽  
Radiation Shielding ◽  
Nuclear Radiation ◽  
Conventional Concrete ◽  
Absorption Length ◽  
Attenuation Coefficients

Radiation leakage is a serious problem in various technological applications. In this paper, radiation shielding characteristics of some natural rocks are elucidated. Mass attenuation coefficients (µ/ρ) of these rocks are obtained at different photon energies with the help of the EPICS2017 library. The obtained µ/ρ values are confirmed via the theoretical XCOM program by determining the correlation factor and relative deviation between both of these methods. Then, effective atomic number (Zeff), absorption length (MFP), and half value layer (HVL) are evaluated by applying the µ/ρ values. The maximum μ/ρ values of the natural rocks were observed at 0.37 MeV. At this energy, the Zeff values of the natural rocks were 16.23, 16.97, 17.28, 10.43, and 16.65 for olivine basalt, jet black granite, limestone, sandstone, and dolerite, respectively. It is noted that the radiation shielding features of the selected natural rocks are higher than that of conventional concrete and comparable with those of commercial glasses. Therefore, the present rocks can be used in various radiation shielding applications, and they have many advantages for being clean and low-cost products. In addition, we found that the EPICS2017 library is useful in determining the radiation shielding parameters for the rocks and may be used for further calculations for other rocks and construction building materials.

scholarly journals The Effect of Working Gases Mixing Ratios on the Synthesis and Characteristics of TiO2/SiO2 Nanocomposite via Closed-Field unbalanced DC Magnetron Co-Sputtering Technique

2021 ◽  
Vol 2114 (1) ◽  
pp. 012060
Author(s):  
N. H. Mutesher
Keyword(s):  
Optical Properties ◽  
Nanocomposite Films ◽  
Closed Field ◽  
Mixing Ratio ◽  
X Ray Diffraction ◽  
Energy Band Gap ◽  
Structural And Optical Properties ◽  
Mixing Ratios ◽  
Deposition Parameters ◽  
Nanocomposite Thin Films

Abstract The objective of this research is to study the influence of deposition parameters such as gases mixing ratio O2/Ar on the structural and optical properties of the TiO2/SiO2 nanocomposite films synthesized using closed field unbalanced dc magnetron co-sputtering technique. The nanocomposite thin films were characterized using x-ray diffraction (XRD) to determine the phase structure, and Fourier transform infrared (FTIR) spectroscopy to investigate Si-O-Si, Ti-O and Si–O–Ti. functional groups. The UV-VIS. absorption spectra of the synthesized films reveal that the indirect energy band gap was found to be 2.75 eV. The mixing ratio of Oxygen and Argon (O2/Ar) gases has a pronounced controlling effect on the structural and optical properties of such nanocomposite.

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