Gamma, X-ray and neutron shielding parameters for the Al-based glassy alloys

Manjunatha, H.C.; Seenappa, L.; B.M, Chandrika; Sridhar, K.N.; Hanumantharayappa, Chikka

doi:10.1016/j.apradiso.2018.05.014

Cited by 60 publications

(4 citation statements)

References 29 publications

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“…7, the σ abs values are 0.032, 0.050, 0.067 and 0.077 (barn) for PVA, 1% Fe 2 O 3 , 1% NiO and 1% Ni samples, respectively. The materials with the highest σ abs could be used as excellent shielding material against neutrons [35]. The results presented that, PVA with a 1% Ni sample has the largest neutron absorption.…”

Section: Radiation Shieldingmentioning

confidence: 94%

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Structural, electrical and radiation shielding properties of polyvinyl alcohol doped with different nanoparticles

Rashad

Hanafy

Issa

2020

J Mater Sci: Mater Electron

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Both pure and doped polyvinyl alcohol (PVA) with 1 wt% of Ni, NiO and Fe 2 O 3 nanoparticles (NPs) were prepared using the casting method. The structural and electrical properties of the composite were extensively studied. Moreover, the radiation shielding of these composites was studied. XRD results prove the semi-crystalline structure of pure PVA because of crystalline and amorphous phases are appeared. The electrical conductivity (σ dc) and current-voltage (I-V) characterization for all PVA samples have been an investigation. The separation (R) and energy of hopping (W) were calculated. Also, the temperature dependence of the conductivity for all pure samples was investigated using Mott's variable-range hopping model. The obtained results suggest strongly the applicability of these samples in the electronic applications. Furthermore, radiation shielding parameters have been calculated. Results show that PVA with 1% Ni sample has the highest values of mass attenuation coefficient, effective atomic number, fast neutrons removal cross-sections and absorption neutron scattering cross-section among other samples.

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Section: Radiation Shieldingmentioning

confidence: 94%

“…To estimate the capability of samples to reduce the neutron, the fast neutrons removal cross-sections (Σ R ) and absorption neutron scattering cross-section (σ abs ) are considered as a significant parameter used in this respect. To calculate the Σ R and σ abs of samples the following equations have been used [33][34][35]:…”

Section: Radiation Shieldingmentioning

confidence: 99%

Structural, electrical and radiation shielding properties of polyvinyl alcohol doped with different nanoparticles

Rashad

Hanafy

Issa

2020

J Mater Sci: Mater Electron

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“…This may be because it is fragile, incoherent, and has very many cracks and holes, as found in nature [75] The results of clay X-ray shielding were significantly high, reaching the best rad attenuation rate of 99.79%, which is excellent compared to lead and tungsten [76,77]. high shielding properties may be due to the components of the clay composed of va elements and metals with different contents, such as Al [78], Fe [79], Ti [80], Sr [81 Si [82]. Consequently, the shielding rate values differed amongst the samples acco to the proportions of the constituent elements.…”

Section: Effect Of Radiation Protection (Shielding)mentioning

confidence: 99%

Structural Study of Nano-Clay and Its Effectiveness in Radiation Protection against X-rays

et al. 2022

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With the increasing applications of nuclear technology, radiation protection has become very important especially for the environment and the personnel close to radiation sources. Natural clays can be used potentially for shielding the X-ray radiations. In this study, the correlation between structural parameters and radiation shielding performance of natural clay extracted from Algerian Sahara (Adrar, Reggan, and Timimoune) was investigated. Phase composition and structural parameters (lattice parameters, average crystallite size, and microstrain) were determined by the Rietveld refinements of X-ray diffraction patterns in the frame of HighScore Plus software. The obtained results showed that the studied clays are nanocrystalline (nano-clay) since the calculated crystallite size was ≈3 nm for the feldspar phase. FTIR spectra confirmed the presence of all phases already detected by XRD analysis besides Biotite (around the band at 3558 cm−1). The remaining bands corresponded to absorbed and adsorbed water (3432 cm−1 and 1629 cm−1, respectively) and atmospheric CO2 (2356 cm−1). The shielding properties (mass absorption coefficient—µ/ρ and radiative attenuation rate—RA) for (green-yellow, green, and red) clays of Adrar, (red, white, and white-red) clays of Reggan, and red clay of Timimoune at same energy level were examined. The results of clay samples were compared with each other. The obtained results indicated that the green clay of Adrar exhibited the superior radiation shielding, i.e., 99.8% and 243.4 cm2/g for radiative attenuation rate and mass absorption coefficient, respectively.

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“…in addition, both materials are capable of attenuating the radiation. Several different materials have been tested for radiation shielding applications including steel, resins, polymers, minerals, and composites [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Role of heavy metal oxides on the radiation attenuation properties of newly developed TBBE-X glasses by computational methods

et al. 2021

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Geant4 simulations and several theoretical approaches such as WinXCOM and ESTAR were used in this work to understand the role of heavy metal oxides on the radiation attenuation features of newly developed TBBE-X glasses which are in the form of 19.5TeO2-30B2O3-30BaO-0.5Er2O3-20X. Here X stands for SrO, Al2O3, CdO, ZnO, PbO and Bi2O3. According to X (modifier oxide), the glass samples were labelled as TBBE-S, TBBE-A, TBBE-C, TBBE-Z, TBBE-P, and TBBE-B. Various attenuation features such as mass attenuation coefficient (MAC), buildup factors, equivalent and effective atomic numbers, half value layer (HVL), and neutron cross section were investigated. The inclusion of high atomic number and dense atoms in the modifiers (PbO and Bi2O3) in TBBE-P and TBBE-B explains why the energy for the onset of increment in MAC was earliest among the investigated glasses. At a photon energy of 15 keV, HVL of TBBE-S, TBBE-A, TBBE-Z, TBBE-C, TBBE-P, and TBBE-B were 4.67, 5.02, 4.40, 3.91, 3.53, and 3.31 cm respectively. It is found that the TBBE-X glasses have promising shielding properties against gamma radiation comparing to different species of commercial glasses and concrete. The outcomes also reveal that the TBBE-X specimens are comparatively better shields against fast neutron compared to classical shields like graphite, water, and ordinary concrete. Therefore, the TBBE-X glasses have promising shielding properties and can be applied in shielding applications against gamma rays and neutrons beam.

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Gamma, X-ray and neutron shielding parameters for the Al-based glassy alloys

Cited by 60 publications

References 29 publications

Structural, electrical and radiation shielding properties of polyvinyl alcohol doped with different nanoparticles

Structural, electrical and radiation shielding properties of polyvinyl alcohol doped with different nanoparticles

Structural Study of Nano-Clay and Its Effectiveness in Radiation Protection against X-rays

Role of heavy metal oxides on the radiation attenuation properties of newly developed TBBE-X glasses by computational methods

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