Attenuation coefficients and exposure buildup factor of some rocks for gamma ray shielding applications

Obaid, Shamsan S.; Sayyed, M.I.; Gaikwad, D.K.; Pawar, Pravina P.

doi:10.1016/j.radphyschem.2018.02.026

Cited by 267 publications

(60 citation statements)

References 51 publications

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“…A comparison of the measured mass attenuation coefficient values for different kinds of samples at the same energy measured in different countries is shown in Table 5. Comparing the attenuation coefficients for different types of samples at photon energies of 1173 and 1332 keV indicates some difference from the values measured in our study; however, at 662 keV, the difference is much smaller and is in broad agreement with the data of Gökçe et al [47] in Turkey, Alam et al [23] in Bangladesh and Obaid et al [27] in India.…”

Section: Mass Attenuation Coefficientsupporting

confidence: 83%

“…A number of experimental and theoretical works have been performed on radiation shielding, which has large different application areas with different materials such as bricks [15], ores [16,17], glasses [18,19], organic compounds [20], minerals [21], soil [22,23]), rocks [24][25][26][27], concretes [28,29] and building materials [30,31]. Variety of rocks and concretes are used in the radiation shielding technology because of its high attenuation cross section for X-rays, gamma ray photons and neutrons.…”

Section: Introductionmentioning

confidence: 99%

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Nano-structured natural bentonite clay coated by polyvinyl alcohol polymer for gamma rays attenuation

et al. 2019

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The main goal of this work is to find natural rock materials that can be used as effective gamma rays shielding at minimal cost, reliability and wide applications. It must be at particular weight and volume (lighter and more protection). Natural bentonite clay can be used as shelters from nuclear waste because of its large availability and low cost. Bentonite clay was used in two forms naturally as it is from its ores and in ground phase. Natural bentonite was cut into cylindrical pellets at different thicknesses; also, the other form pressed into cylindrical pellets with different thicknesses and different pressing pressures (50, 100 and 150 bar). The different samples are coated with polyvinyl alcohol polymer to prevent nuclear waste leakage through porosity of clay. Chemical analysis and density are measured for all samples. Bentonite clay was found naturally in nanometer scale because it is formed from volcanic ash deposits. The nanoparticle size was determined by dynamic light scattering and Williamson-Hall size analysis using XRD patterns and the help of X-powder program. The particle size of natural bentonite was found to be 59.79 nm. The microstructure was characterized by scanning electron microscope and transmission electron microscopy. The linear and mass attenuation coefficients of nano-structured bentonite clay (natural and pressed) were determined at 662 keV energy of 137 Cs; at 1173 and 1332 keV energies of 60 Co, gamma ray sources were determined by using NaI(Tl) scintillation detector. The experimental results showed that the ground bentonite pressed at 150 bar gave the highest linear and mass attenuation coefficients than other samples. The theoretical and the experimental calculations of mass attenuation coefficient were found to be in a good agreement.

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Section: Mass Attenuation Coefficientsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Nano-structured natural bentonite clay coated by polyvinyl alcohol polymer for gamma rays attenuation

et al. 2019

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“…While as the energy increases, the probability of the photoelectric absorption process is reduced and other two processes namely Compton scattering (Table 6) and pair production (P.P) ( Table 7 and Fig. 13) become the most dominate interactions, where this occurs specifically for E > 1.022 MeV [44,45]. These results (dependent of µ/ρ on the photon energy) are corresponding with the recently published literature on different materials like rocks [44], glasses [46][47][48][49][50], bricks [51], and amino acids [52].…”

Section: Reflection Loss (R L ) and Optical Transmission (T)mentioning

confidence: 99%

Optical, magnetic characterization, and gamma-ray interactions for borate glasses using XCOM program

et al. 2019

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In the present study, the optical characterization of borate glasses with composition 35Li 2 O − 10ZnO − 55B 2 O 3 − xMnO 2 : x = 0, 0.5, 1.0, 1.5, and 2.0 wt% has been investigated. The absorption spectra measurements within the wavelength domain 200-1000 nm have been carried out. The optical energy gap of the investigated samples using the absorption spectrum fitting (ASF) model has been calculated. The molar refraction, molar polarizability, reflection loss, optical transmission for the samples were estimated. The metallization criterion, dielectric constant, refractive index, and energy band metallization criterion for the studied glasses were estimated. Magnetic property measurements for all glass samples were carried out at 300 K. Additionally, the prospects of gamma-ray interactions with the investigated glasses have been achieved through studying the total mass attenuation, coherent, Compton, photoelectric, and pair production interactions at photon energy in the range of 0.356-1.330 MeV. Results reveal that the optical and magnetic properties of the investigated glasses change with changing the MnO 2 concentration. Studied glasses can be used as a candidate for optical fiber and optical devices application. In the other hand, at lower gamma photon energy range, the photoelectric absorption dominates with the glasses, while as the energy increases, the probability of Compton scattering and pair production become the most dominate interactions.

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“…Recently, due to the development of radiation isotopes and its applications in many fields, numerous works reported the shielding properties of distinct materials such as glass (Mahmoud & Rammah, 2019;Sayyed et al, 2018b), concretes (Mahmoud, Sayyed, & Tashlykov, 2019a;Mahmoud, Tashlykov, El Wakil, & El Aassy, forthcoming), alloys (Agar, Sayyed, Akman, Tekin, & Kaçal, 2018), rocks and natural materials (Abu El-soad, Sayyed, Mahmoud, Erdem, & Kovaleva, 2019;Mahmoud et al, 2019a;Obaid, Sayyed, Gaikwad, & Pawar, 2018;Oto, Yildiz, Akdemir, & Kavaz, 2015).…”

Section: Introductionmentioning

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%

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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Attenuation coefficients and exposure buildup factor of some rocks for gamma ray shielding applications

Cited by 267 publications

References 51 publications

Nano-structured natural bentonite clay coated by polyvinyl alcohol polymer for gamma rays attenuation

Nano-structured natural bentonite clay coated by polyvinyl alcohol polymer for gamma rays attenuation

Optical, magnetic characterization, and gamma-ray interactions for borate glasses using XCOM program

Modified halloysite minerals for radiation shielding purposes

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