Gamma ray shielding characteristics and exposure buildup factor for some natural rocks using MCNP-5 code

Mahmoud, K.A.; Sayyed, M.I.; Ташлыков, О. Л.

doi:10.1016/j.net.2019.05.013

Cited by 122 publications

(41 citation statements)

References 36 publications

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“…E > 3 MeV), the linear attenuation coefficient increases slowly with the incident gamma-ray energy due to the pair production cross section. Which is proportional to log E (Mahmoud et al, 2019b;Oto et al, 2015). The half-value (HVL) in the present work is used to describe the thickness of halloysite samples required to reduce the gamma radiation to half of its incident values.…”

Section: Resultsmentioning

confidence: 99%

“…The EBF can be calculated by using G-P method which is adopted by American National Standard ANSI/ANS-6.4.3-1991 as the best method to evaluate EBF of composite materials. EBF of any material can be evaluated in three steps (Mahmoud et al, 2019b):…”

Section: Theoretical Calculationmentioning

confidence: 99%

“…Due to the low cost, and abundance of natural rocks and minerals, we can use it directly or as aggregates in the radiation shielding fabrication. Many works studied the shielding properties of various rocks and natural minerals (Mahmoud, Sayyed, & Tashlykov, 2019b;Mavi, 2012;Obaid et al, 2018). The works concluded that granites, marbles, and basalt have the best shielding characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Modified halloysite minerals for radiation shielding purposes

Mansour

Sayyed

Mahmoud

et al. 2020

Journal of Radiation Research and Applied Sciences

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Halloysite is a clay mineral found in the natural environment and it has many applications in chemistry and medical fields. The linear attenuation coefficient (µ) for halloysite nanotubes minerals simulated using MCNP 5 code between 0.015 and 15 MeV. Moreover, the linear attenuation coefficient calculated for all selected samples using Phys-X/PDS program. Furthermore, some important shielding parameters that described the penetration and interaction of gamma rays with halloysite atoms, such as the half-value (HVL), effective atomic number (Z eff), and exposure buildup factor (EBF) were calculated for gamma rays between 0.015 and 15 MeV.

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Section: Resultsmentioning

confidence: 99%

Section: Theoretical Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modified halloysite minerals for radiation shielding purposes

Mansour

Sayyed

Mahmoud

et al. 2020

Journal of Radiation Research and Applied Sciences

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“…Many studies have been performed on the measurement of linear and mass attenuation coefficient for different concretes which can be used as radiation shielding (Akkurt et al, 2004;Bashter, 1997;Yılmaz, et al, 2011;El-Sayed Abdo, 2002;Gencel et al, 2011;Kharita et al, 2008;Rezaei-Ochbelagh and Azimkhani, 2012;Shirmardi et al, 2013;Singh et al, 2004Singh et al, , 2015Türkmen et al, 2008;Singh et al, 2008;Waly et al, 2016), building materials (Alam et al, 2001;El-Khayatt, 2010;Salinas et al, 2006;Cay et al, 2014), glasses (El-Mallawany et al, 2017;Kumar et al, 2019Kumar et al, , 2018Sayyed, 2016;Sayyed et al, 2018), polymers (Aygün et al, 2015), rocks (Mahmoud et al, 2019;Obaid et al, 2018) and ores (Korkut et al, 2012). Now it is necessary to look for cheap, economical, friendly and locally available shielding materials (Akkurt et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Basalt has very low level of radioactive content and considered as a good thermal insulator. Moreover, basalt rocks were reported to have high shielding properties as compared to other rocks (Mahmoud et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Aggregates grain size and press rate dependence of the shielding parameters for some concretes

Mahmoud

Ташлыков

Wakil

et al. 2020

Progress in Nuclear Energy

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This study points to evaluate the effect of crushed basalt grain size and the press rate on gamma ray shielding properties for some concretes. Nine different concretes were made up of 75% basalt, 25% Portland cement and drops of sodium meta silicate. Three concretes were performed with an average grain size varied between 25 and 107 μm. The other six concretes were performed under different press rate varied between 1.01 and 142.76 kg/ cm 2 using a hydraulic press. The mass attenuation coefficient (μ m ) of the prepared concretes was measured using the narrow beam transmission method using a hyper pure germanium detector at gamma ray energies 661.6,

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Gamma irradiation, thermal conductivity, and phase change tests of the cement‐hyperbranched poly amino‐ester‐block‐poly cabrolactone‐polyurathane plaster‐lead oxide and arsenic oxide composite for development of radiation shielding material

Cinan

Baskan

Erol

et al. 2021

Intl J of Energy Research

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Summary The work which has been done on cement‐polymer composite based shielding materials was comprehensively described in the present article, the choice of the study presented here is based on the choice of the researches. The new Hyperbranched Poly Amino‐Ester‐block‐Poly Caprolactone‐Polyurathane Plaster‐concrete composites mixed with different percentage soft lead oxide and arsenic oxide is used to research gamma‐ray shielding and thermal conductivity characteristics. The synthesis of new Hyperbranched Poly Amino‐Ester‐block‐Poly Caprolactone‐Polyurathane copolymer was achieved by Atom Transfer Reaction and Condensation Polymerization methods. The characterization of Hyperbranched Poly Amino‐Ester‐block‐Poly Caprolactone‐Polyurathane Plaster was made with the Nuclear Magnetic Resonance, Fourier Transform Infrared Spectroscopy, Differential Scanning Calorimetry, Gel Permeation Chromatography, Thermogravimetric Analysis, Scanning Electron Microscope methods. The transmitted fluxes of gamma‐rays that were emitted from Eu152 source was detected by a High Purity Germanium (HPGe) detector system at Karadeniz Technical University‐Department of Physics in Trabzon and analyzed by a GammaVision (Version:6.07‐Ortec, Oak Ridge, TN) computer program. The composite phase change materials including 89, 87, 69, 67% Portland cement, 1% and 3% PU‐Plaster, 10% and 30% weight percent lead oxide and arsenic oxide was irradiated in the various gamma ray photon energy region (121.78, 344.28, 778.90, 964.08, 1085.87, 1112.07, and 1408.01 keV) for 3600 seconds. Then, linear attenuation coefficients, mass attenuation coefficients, half‐value layer, tenth value layer, mean free path, radiation protection efficiency, and gamma‐rays absorption of concrete‐the Hyperbranched Poly Amino‐Ester‐block‐Poly Caprolactone‐Polyurathane copolymers specimens were experimentally investigated. Thermal properties and morphological analysis of the irradiated substances were explored handling differential scanning calorimetry, thermogravimetric analysis, and scanning electron microscope methods of the nano lead oxide and arsenic oxide including composite phase change material via gamma irradiation were submitted. Moreover, the effect of the Hyperbranched Poly Amino‐Ester‐block‐Poly Caprolactone‐Polyurathane amount on the radiation attenuation of the composite material was investigated. Gamma attenuation experiments have been performed to specify lead equivalent values for the improved composite material. The composite equivalent thickness values from 0.5 to 0.6 cm sample thickness and 0.665 cm radius were obtained. Via crosschecking the acquired data from concrete samples with and without lead and arsenic, it was observed that, if the powder of lead oxide and arsenic oxide to cement ratio of 10% and 30% by weight is added in the concrete mixture, the concrete‐the Hyperbranched Poly Amino‐Ester‐block‐Poly Caprolactone‐Polyurathane composite can be used as a suitable shield against gamma rays. Also, mass attenuation coefficients were calculated as theoret...

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Gamma ray shielding characteristics and exposure buildup factor for some natural rocks using MCNP-5 code

Cited by 122 publications

References 36 publications

Modified halloysite minerals for radiation shielding purposes

Modified halloysite minerals for radiation shielding purposes

Aggregates grain size and press rate dependence of the shielding parameters for some concretes

Gamma irradiation, thermal conductivity, and phase change tests of the cement‐hyperbranched poly amino‐ester‐block‐poly cabrolactone‐polyurathane plaster‐lead oxide and arsenic oxide composite for development of radiation shielding material

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