Calculation of the cross-sections for fast neutrons and gamma-rays in concrete shields

Abdo, A. El‐Sayed

doi:10.1016/s0306-4549(02)00019-1

Cited by 114 publications

(24 citation statements)

References 4 publications

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“…Heavyweight concrete is the most widely used in the world for this aim. The aggregate component of concrete that contains a mixture of many heavy elements plays an important role in improving concrete shielding properties and therefore has good shielding properties for the attenuation of photons and neutrons [3]. The purpose of radiation shielding is to limit radiation exposures to members of the public and employees to an acceptable level [4].…”

Section: Introductionmentioning

confidence: 99%

Determination of Some Heavyweight Aggregate Half Value Layer Thickness Used for Radiation Shielding

et al. 2012

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A radiation dose above the maximum permissible limit is very dangerous for human being. In radiation shielding, absorbent materials' properties must be well known. Heavyweight concrete is the most widely used in the world for this aim. The aggregate component of concrete plays an important role in improving concrete properties and this is effect of shielding properties of concrete. The thickness of any given material where 50% of the incident energy has been attenuated is known as the half-value layer. The half-value layer is expressed in units of distance (mm or cm). Like the attenuation coefficient, it is photon energy dependent. Increase of the penetrating energy of a stream of photons will result in an increase in a material's half-value layer. In this study, half-value layer thickness of concrete containing limonite, siderite and barite at different ratios was investigated; for this purpose measurements have been obtained by a collimated beam of gamma ray from sources 60 Co. The total linear attenuation coefficient (µ), half-value layer thickness is evaluated in this study.

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Section: Introductionmentioning

confidence: 99%

Determination of Some Heavyweight Aggregate Half Value Layer Thickness Used for Radiation Shielding

et al. 2012

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“…Studies have reported that about 75% of the neutrons at the maze entrance of these rooms are scattered neutrons [14,15]. Also, the studies have shown the fluence of scattered photons and neutrons per angle by different shielding materials as well as concretes depend on the composition of concretes and used shielding materials.…”

Section: Introductionmentioning

confidence: 99%

Neutron and photon scattering properties of high density concretes used in radiation therapy facilities: A Monte Carlo study

Mesbahi

Khaldari

2017

Polish Journal of Medical Physics and Engineering

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In the current study the neutron and photon scattering properties of some newly developed high density concretes (HDCs) were calculated by using MCNPX Monte Carlo code. Five high-density concretes including Steel-Magnetite, Barite, Datolite-Galena, Ilmenite-ilmenite, Magnetite-Lead with the densities ranging from 5.11 g/cm 3 and ordinary concrete with density of 2.3 g/cm 3 were studied in our simulations. The photon beam spectra of 4 and 18 MV fromVarian linac and neutron spectra of clinical 18 MeV photon beam was used for calculations. The fluence of scattered photon and neutron from all studied concretes was calculated in different angles. Overall, the ordinary concrete showed higher scattered photons and Datolite-Galena concrete (4.42 g/cm 3 ) had the lowest scattered photons among all studied concretes. For neutron scattering, fluence at the angle of 180 was higher relative to other angles while for photons scattering fluence was maximum at 90 degree. The scattering fluence for photons and neutrons was dependent on the angle and composition of concrete. The results showed that the fluence of scattered photons and neutrons changes with the composition of high density concrete. Also, for high density concretes, the variation of scattered fluence with angle was very pronounced for neutrons but it changed slightly for photons. The results can be used for design of radiation therapy bunkers.

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“…Beside nuclear facilities (nuclear reactors and particle accelerators), with the increasing use of radiation in medicine, the provision of adequate protection remains an important concern [1][2][3]. The effectiveness of the shielding material is determined by the interactions between the incident radiation and the atoms of the absorbing medium.…”

Section: Introduction:-mentioning

confidence: 99%

Attenuation Coefficient of Reactive Powder Concrete Using Different Energies.

Majeed¹,

Naji²,

Mohammed³

et al. 2016

IJAR

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Linear and mass attenuation coefficient of reactive powder concrete (RPC) sample ( of compressive strength equal to 70 Mpa) using beta particles and gamma ray with different energies have been calculated as a function of the absorber thickness and energy. The attenuation coefficient were obtained using NaI(Tl) energy selective scintillation counter with 90 Sr/ 90 Y beta source having an energy rang from (0.546-2.274) MeV and gamma ray energies (0.569, 0.662, 1.063, 1.17 and 1.33) MeV . The attenuation coefficient usually depends upon the energy of radiations and nature of the material. The result represented in graphical forms. Exponential decay was observed. It is found that the capability of reactive powder concrete to absorber beta particles and gamma ray without any significant reduction in the compressive strength of the sample. That's mean it is useful to choice this sample for radiation shielding of gamma and beta raywith low thickness.Copy Right, IJAR, 2016,. All rights reserved.

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Calculation of the cross-sections for fast neutrons and gamma-rays in concrete shields

Cited by 114 publications

References 4 publications

Determination of Some Heavyweight Aggregate Half Value Layer Thickness Used for Radiation Shielding

Determination of Some Heavyweight Aggregate Half Value Layer Thickness Used for Radiation Shielding

Neutron and photon scattering properties of high density concretes used in radiation therapy facilities: A Monte Carlo study

Attenuation Coefficient of Reactive Powder Concrete Using Different Energies.

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