Gamma-ray shielding study of light to heavyweight concretes using MCNP-4C code

Bagheri, Reza; Moghaddam, Alireza Khorrami; Yousefi, Ali Akbar

doi:10.1007/s41365-016-0167-6

Cited by 20 publications

(4 citation statements)

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“…Appl., Vol. XX, X, (2023) promising material for radiation protection [9,10]. However, moisture variation in concretes makes it difficult to predict radiation protection [11].…”

Section: Introductionmentioning

confidence: 99%

Elastic Rubber Composites as Shield against Photons and Neutrons.

Ibrahim

Ali

Kansouh

et al. 2023

Arab Journal of Nuclear Sciences and Applications

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A synthetic, ethylene-propylene-diene terpolymer monomer (EPDM) rubber reinforced with carbon-black (N-220) as a filler with the addition of different concentrations of lead powder (0-500 phr), was developed to be used as a radiation shielding against  -rays. Experimental studies on the influence of -radiation on the target samples were carried out using 137 CS (E  = 0.662 Mev) and ( 60 Co with energies of 1.172 Mev and 1.332 Mev). The attenuation coefficient and HVL were improved by two ways; one way by increasing the concentration of lead powder at constant thickness and the other by increasing the thickness of the composite samples at a constant concentration of lead powder. A high attenuation coefficient and HVL was obtained for 400phr lead (μ=0.0852 and 0.141 cm -1 for Eγ = 0.662, and 1.172 Mev respectively). Good results were also obtained for HVL when using 400phr lead (HVL= 8.137, 4.915, and 5.627 cm for Eγ = 0.662, 1.172, and 1.332 Mev respectively). For testing the moderating fast neutron emitted from 239 Pu-9 Be, samples containing 100, 200, and 300 phr lead and 25 phr borax were used. The results showed good enhancement/improvement in the values of the total macroscopic cross section. As a result of using the X.com program, it was found that the values of the linear and mass attenuation coefficients were in a good agreement with the experimentation values for uniform and collimated beams. However, this could not be confirmed for heterogeneous beams.

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“…Appl., Vol. XX, X, (2023) promising material for radiation protection [9,10]. However, moisture variation in concretes makes it difficult to predict radiation protection [11].…”

Section: Introductionmentioning

confidence: 99%

Elastic Rubber Composites as Shield against Photons and Neutrons.

Ibrahim

Ali

Kansouh

et al. 2023

Arab Journal of Nuclear Sciences and Applications

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“…From the radiation protection point of view the main idea is that the wall thicknesses must be sufficient to prevent the external vicinities of the room to receive an amount of radiation doses above the permissible levels. Several materials have been investigated to be used for shielding of a radiotherapy room [BAGHERI, 2017;KUMAR, 2017]. In this short study we perform a simple estimation of barrier thicknesses of a standard radiotherapy facility room housing a LINAC that produces photon beams in the energy range 4-30 MeV.…”

Section: Introductionmentioning

confidence: 99%

An initial study on common concrete, titanium dioxide and tungsten dioxide for shielding of a standard external photon beam radiotherapy room

Moreto,

De Paiva

2023

SHS

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High-energy ionizing radiations have several applications including the treatment of various types of cancer. Advanced techniques such as IMRT (Intensity Modulated Radiation Therapy) and VMAT (Volumetric Modulated Arc Therapy) using high-energy photon beams have been largely used for radiation therapy of cancer. An important issue in radiotherapy is the evaluation of the shielding of the walls of the facility room housing a linear accelerator that produces high-energy photon beams. In this study we performed an estimation of the thicknesses of a standard radiotherapy room considering three different materials: common concrete, titanium dioxide (TiO2) and tungsten dioxide (WO2). It is assumed that patients are treated with photon beams of energies varying from 4 to 30 MeV and considering two types of treatments, only conventional and conventional plus IMRT and VMAT treatment. Results have shown an overall growth of thicknesses with energy, workload, area and type of treatment. At 1,000 Gy/week and 30 MeV photon energy the primary barrier thickness using concrete as the shielding material showed to be substantially higher as compared to TiO2 (143%) and WO2 (1,360%). Results have also indicated an overall linear increasing of volumes with the area used to construct the facility room.

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“…Lead is a highly toxic material, which makes its use difficult. Heavy concrete is another promising material for radiation protection (Pomar, 2016;Bagheri et al, 2017a). However, moisture variation in concretes makes it difficult to predict radiation protection (More et al, 2021).…”

Section: Introductionmentioning

confidence: 99%