Showing papers in "Radiation Physics and Chemistry in 2018"

TL;DR: In this article, the mass attenuation coefficient µ/ρ is investigated experimentally and theoretically for seven rocks (olivine basalt, green marble, jet black granite, cuddapah limestone, white marble and pink marble).

TL;DR: Gamma shielding parameters such as mass attenuation coefficient (µ/ρ), effective atomic number (Zeff) and electron density (Neff) have been measured and calculated for rocks and concrete in the energy range 122-1330 kV as mentioned in this paper.

TL;DR: In this article, the mass attenuation coefficient (µ/ρ) for the HSC concrete blended with WO3 and Bi2O3 in both micro and nano scales was calculated using MCNPX (version 2.6.0) general purpose Monte Carlo code in the photon energy range 0.142-1.33

TL;DR: In this article, the mass attenuation coefficients of lead glass systems are simulated using MCNP5 code in the photon energy ranging from 0.015 to 10.5 MeV.

TL;DR: In this article, the mass attenuation coefficients (μ/ ρ ) for total photon interaction have been determined by using Geant4 package in the energy region 1'keV-1000'MeV for biomolecules such as creatinine hydrochloride, methionine, glycoprotein, glycine, proline and lactose.

TL;DR: In this article, mass attenuation coefficients, effective atomic number (Zeff), electron density (Ne), mean free path (MFP), and half-value layer (HVL) of 20 BaO/SrO/Bi2O3/B2O 3 glasses were calculated using WinXCom program and MCNP5 code.

TL;DR: In this article, nano-sized lead oxide (PbO) particles were used, for the first time, to obtain an elastomeric composite material in which lead oxide nanoparticles, after the surface modification with silane binding agent, was used as functional material for radiation shielding.

TL;DR: In this paper, the authors used lattice cards in MCNPX code to construct nano-particles with sizes of 100nm and 1µm inside a silicon resin matrix.

TL;DR: In this paper, a renewable cellulosic adsorbent by γ-initiated grafting of poly(glycidyl methacrylate) (PGMA) from cellulose substrate and subsequent modification of PGMA with chelating species, iminodiacetic acid (IDA), for Cd (II), Pb (II) and Cu(II) removal from aqueous media.

TL;DR: In this article, the mass attenuation coefficient, half value layer (HVL), and exposure rate with and without build up factor were computed using MicroShield in the energy range of 15-300 keV.

TL;DR: In this paper, the gamma-ray shielding, cure characteristics, physical, and mechanical properties of EPDM rubber composites with additions of metal oxides (either iron (II, III) oxide, Fe3O4, tungsten (III) oxide; W2O3 or bismuth (III), oxide; Bi2O 3) for potential use as flexible, durable, and lead-free gamma ray shielding materials.

TL;DR: In this article, a modified Hummers method coupled with a multi-stage manufacturing procedure, graphene oxide (GO) decorated with Pb3O4 (GO-Pb 3O4) at different weight ratios was synthesized.

TL;DR: In this paper, UP/nanoclay/PbO composites were found to be suitable materials for the low-energy gamma radiation shielding applications, whereas the observed negative effects could be moderated by the clay nanoparticle.

TL;DR: In this paper, a polymer nanocomposite based novel type of multifunctional neutron shielding material is designed and fabricated, where high density polyethylene (HDPE) was compounded with different amounts of hexagonal boron nitride (h-BN) and Gd 2 O 3 nanoparticles having average particle size of 100nm using melt-compounding technique.

TL;DR: In this article, it was suggested that gamma irradiation can be used for producing low molecular weight oat β-d -glucan; which can help in modifying the biological activities.

TL;DR: In this paper, the effect of varying concentration of terbium oxide (Tb 4 O 7 ) on the TL response of zinc lithium borate (ZLB) was investigated and showed remarkable result that made the phosphor suitable for radiation dosimetry.

TL;DR: In this article, the authors used the MCNP5 code to simulate the attenuation of photon in glasses and compared the results with the XCOM program results for four different photon energies in the range of 0.356-1.33

TL;DR: In this paper, the effect of gamma irradiation at various doses (0.5, 1.0, 1.5 and 2.0 ) on protein characteristics and functional properties of sesame seeds was investigated.

TL;DR: In this article, the basic shielding quantities for determining the penetration of radiation in glass, such as mass attenuation coefficient (μ/ρ), half value layer (HVL), mean free path (MFP) and exposure buildup factor (EBF) values were investigated within the energy range 0.015 − 15.MeV using XCOM program and variation of shielding parameters were compared with different glass systems and ordinary concrete.

TL;DR: In this paper, the effect of irradiation treatment on physicochemical properties of three natural polymers, i.e., native potato and corn starches and a typical Brazilian product, cassava starch modified through fermentation -sour cassava- was evaluated.

TL;DR: In this article, seven rare earth (Sm 3+, Eu 3+ and Nd 3+ ) doped lead alumino phosphate glasses were prepared and the protection and sensing measures from gamma rays were analyzed in terms of parameters viz. density (ρ), refractive index, energy band gap (E g ), mean free path (mfp), effective atomic number (Z eff ), and buildup factors (energy absorption EABF as well as exposure buildup factor EBF).

TL;DR: The results of biodegradation experiments performed in activated sludge have shown that the degradation products have become available to the metabolic processes of the microorganisms.

TL;DR: In this article, the influence of electric arc furnace slag aggregates on the mechanical and gamma ray shielding properties of concrete mixtures were studied experimentally and the use of EAF slag and crushed limestone were used as aggregates.

TL;DR: In this paper, a series of derivatives of dextran has been synthesized by coupling of methacrylated glycidyl to the structure of this polysaccharide, yielding Dex-MA.

TL;DR: In this article, the effect of gamma irradiation on buckwheat and potato starch was evaluated for physicochemical and functional properties to assess the effect on the physicochemical properties of irradiated starch.

TL;DR: In this article, the FTIR analysis of lead alkali borosilicate glass has been carried out for different gamma-ray photon energies (356, 662, 1173 and 1332) using narrow beam transmission geometry.

TL;DR: In this article, the degradation of two N-heteroaromatic pollutants, i.e., pyridine and quinoline, was investigated by gamma irradiation in the presence of TiO2 nanoparticles.

TL;DR: A polymer gel dosimeter based on a new gel matrix (AQUAJOINT®) that is a thermo-irreversible hydrogel formed by mixing two types of water-based liquids at room temperature was reported in this article.

TL;DR: In this paper, a chemically modified fibrous bio-adsorbent extracted from a banana trunk was synthesized for potential application in adsorption of heavy metal from wastewater, and the adsorbent was characterized with Scanning Electron Microscopy (SEM), Fourier Transformed Infrared Spectroscopy (ATR-FTIR), and Thermogravimetric Analyzer (TGA).

TL;DR: The radiological properties of PASSAG gel dosimeters showed that this substance can be considered as a soft tissue/water equivalent material and the R2-dose sensitivity and dose resolution of the new gel dosimeter improves over time after irradiation.