Calculation of Gamma-ray Attenuation Parameters for Locally Developed Ilmenite-magnetite (I-M) Concrete

The mass attenuation coefficients (?/?) of locally developed ilmenite-magnetite (I-M) concrete over a wide range of photon energy were calculated analytically using Matlab and compared with the values obtained from widely used XCom computer program. A good agreement between the calculated and XCom generated value was found. The linear attenuation coefficients and relaxation lengths were calculated for the same energy range. The transmission curves were drawn for some common gamma-ray energies and half value layer and tenth value layer were calculated. The results of this study will provide some useful information about the shielding material data base for practical shielding calculation. The results will also illustrate the effectiveness of I-M concrete so far as its shielding properties are concerned.Journal of Bangladesh Academy of Sciences, Vol. 40, No. 1, 11-21, 2016

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Gamma-Ray Attenuation and Exposure Buildup Factor of Novel Polymers in Shielding Using Geant4 Simulation

Materials ◽

10.3390/ma14175051 ◽

2021 ◽

Vol 14 (17) ◽

pp. 5051

Author(s):

Mahmoud T. Alabsy ◽

Jamila S. Alzahrani ◽

M. I. Sayyed ◽

Mahmoud I. Abbas ◽

Daria I. Tishkevich ◽

...

Keyword(s):

Gamma Ray ◽

Effective Atomic Number ◽

Buildup Factor ◽

Geant4 Simulation ◽

Polybutylene Terephthalate ◽

Attenuation Coefficients ◽

High Energies ◽

Gamma Ray Attenuation ◽

Mass Attenuation Coefficients ◽

Good Agreement

Polymers are often used in medical applications, therefore, some novel polymers and their interactions with photons have been studied. The gamma-ray shielding parameters for Polymethylpentene (PMP), Polybutylene terephthalate (PBT), Polyoxymethylene (POM), Polyvinylidenefluoride (PVDF), and Polychlorotrifluoroethylene (PCTFE) polymers were determined using the Geant4 simulation and discussed in the current work. The mass attenuation coefficients (μ/ρ) were simulated at low and high energies between 0.059 and 1.408 MeV using different radionuclides. The accuracy of the Geant4 simulated results were checked with the XCOM software. The two different methods had good agreement with each other. Exposure buildup factor (EBF) was calculated and discussed in terms of polymers under study and photon energy. Effective atomic number (Zeff) and electron density (Neff) were calculated and analyzed at different energies. Additionally, the half-value layer (HVL) of the polymers was evaluated, and the results of this parameter showed that PCTFE had the highest probability of interaction with gamma photons compared to those of the other tested polymers.

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A Novel Radiation Shielding Material for Gamma-Ray: The Development of Lutetium Lithium Borate Glasses

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.766.246 ◽

2018 ◽

Vol 766 ◽

pp. 246-251 ◽

Cited By ~ 4

Author(s):

Punsak Glumglomchit ◽

Juniastel Rajagukguk ◽

Jakrapong Kaewkhao ◽

Keerati Kirdsiri

Keyword(s):

Gamma Ray ◽

Theoretical Data ◽

Borate Glasses ◽

Lithium Borate ◽

Attenuation Coefficients ◽

Effective Electron ◽

Mass Attenuation Coefficients ◽

Shielding Properties ◽

Shielding Material ◽

Mass Attenuation

This work, gamma-ray shielding properties of the lutetium lithium borate glasses in the system Lu2O3 - Li2O - B2O3 have been evaluated as a shielding material at 662 keV photon energy. While the experimental mass attenuation coefficients (μm) have been determined by using the narrow beam transmission method, the theoretical data were calculated using WinXCom program. The good agreements between experimental and theoretical values have been obtained. Both experimental and computational mass attenuation coefficients data were used to obtain the effective atomic number (Zeff), and the effective electron density (Nel). Based on the obtained data, the Lu-based glasses have good shielding properties, the improved glasses could be used as gamma-rays shielding material.

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Gamma Ray Attenuation Coefficient Measurement in Energies 1172 keV and 1332 keV for Neutron Absorbent Saturated Solutions

Volume 5: Safety and Security; Low Level Waste Management, Decontamination and Decommissioning; Nuclear Industry Forum ◽

10.1115/icone14-89090 ◽

2006 ◽

Author(s):

Majid Jalali

Keyword(s):

Attenuation Coefficient ◽

Gamma Rays ◽

Gamma Ray ◽

Neutron Absorption ◽

Attenuation Coefficients ◽

Neutron Sources ◽

Coefficient Measurement ◽

Gamma Ray Attenuation ◽

Mass Attenuation Coefficients ◽

Saturated Solutions

The compounds, Na2B4O7, H3BO3, CdCl2 and NaCl and their solutions, attenuate gamma rays in addition to neutron absorption. These compounds are widely used in shielding of neutron sources, reactor control and neutron converters. Mass attenuation coefficients of gamma related to saturated solutions of the above four compounds, in energies 1172 keV and 1332 keV have been measured by NaI detector and agree very well with the results obtained by Xcom code. Experiment and computation show that, H3BO3 has the highest gamma ray attenuation coefficient among the aforementioned compounds.

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Z dependence of photon interactions in wood materials

Canadian Journal of Physics ◽

10.1139/cjp-2012-0388 ◽

2013 ◽

Vol 91 (3) ◽

pp. 221-225 ◽

Cited By ~ 3

Author(s):

B. Saritha ◽

A.S. Nageswara Rao

Keyword(s):

Gamma Ray ◽

Mass Attenuation Coefficient ◽

Narrow Beam ◽

Attenuation Coefficients ◽

Beam Geometry ◽

Mass Attenuation Coefficients ◽

Experimental Values ◽

Photon Interactions ◽

Good Agreement ◽

Mass Attenuation

Transmission experiments were performed on wood in a narrow-beam geometry using a collimated gamma ray beam at 59.5 and 661.6 keV. The mass attenuation coefficients were determined from experiment, and effective atomic numbers were computed from theoretical equations. It was found that the mass attenuation coefficient decreases with increasing photon energy. Experimental values were compared with those from the XCOM database and with analytical results, and good agreement was achieved. This type of study gives some insight about photon interactions with wood materials.

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Gamma-ray attenuation coefficients of grains and forages

10.31274/rtd-180816-1986 ◽

1964 ◽

Author(s):

Dean Melvin Ruwe

Keyword(s):

Gamma Ray ◽

Attenuation Coefficients ◽

Gamma Ray Attenuation

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Measurement of pulmonary edema in intact dogs by transthoracic gamma-ray attenuation

Journal of Applied Physiology ◽

10.1152/jappl.1979.47.6.1228 ◽

1979 ◽

Vol 47 (6) ◽

pp. 1228-1233 ◽

Cited By ~ 16

Author(s):

D. S. Simon ◽

J. F. Murray ◽

N. C. Staub

Keyword(s):

Pulmonary Edema ◽

Time Course ◽

Gamma Ray ◽

High Sensitivity ◽

Lung Edema ◽

Lung Water ◽

Vascular Congestion ◽

Isolated Lung ◽

Wide Range ◽

Gamma Ray Attenuation

We evaluated the attenuation of the 122 keV gamma ray of cobalt-57 across the thorax of anesthetized dogs as a method for following the time course of lung water changes in acute pulmonary edema induced by either increased microvascular permeability or increased microvascular hydrostatic pressure. The gamma rays traversed the thorax centered on the seventh rib laterally where the lung mass in the beam path was greatest. Calibration measurements in isolated lung lobes demonstrated the high sensitivity and inherent accuracy of the method over a wide range of lung water contents. In control dogs reproducibility averaged +/-3%. Increased permeability edema led to large rapid increases in the transthoracic gamma ray attenuation (TGA), while increased pressure caused an immediate, modest increase in TGA (vascular congestion) followed by a slow further increase over 2 h. There was a fairly good correlation between the increase in extravascular lung water and the change in TGA. The method is simple, safe, and noninvasive and appears to be useful for following the time course of lung water accumulation in generalized lung edema in anesthetized animals.

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