Photoelectric Fraction and Total Mass Attenuation Coefficient of Ce:YAG, Ce:GAGG and Ce:LuAG Single Crystals at 662 keV Gamma Radiation Energy

2019 ◽  
Vol 17 ◽  
pp. 1494-1499
Author(s):  
Akapong Phunpueok ◽  
Voranuch Thongpool ◽  
Sarawut Jaiyen ◽  
Weerapong Chewpraditkul
Keyword(s):  
Gamma Radiation ◽  
Single Crystals ◽  
Attenuation Coefficient ◽  
Total Mass ◽  
Radiation Energy ◽  
Mass Attenuation Coefficient ◽  
Mass Attenuation

Theoretical Study of the Photon Interaction for Zirconium Alloy at 1 keV to 100 MeV

2016 ◽  
Vol 675-676 ◽  
pp. 730-733
Author(s):  
Chumphon Khobkham ◽  
W. Chaiphaksa ◽  
P. Limkitjaroenporn ◽  
P. Prongsamrong ◽  
P. Wiwatkanjana ◽  
...  
Keyword(s):  
Attenuation Coefficient ◽  
Total Mass ◽  
Zirconium Alloy ◽  
Gamma Ray ◽  
Mass Attenuation Coefficient ◽  
Chemical Compositions ◽  
Electron Densities ◽  
Attenuation Coefficients ◽  
Effective Atomic Numbers ◽  
Mass Attenuation

In this work, the total mass attenuation coefficient and partial interactions of the zirconium alloy have been calculated by WinXCom program at 1 keV-100 MeV gamma ray energies. Zr2(Fe,Ni) alloys was studied for the mass attenuation coefficients, photoelectric absorption, incoherent, coherent and pair production processes. The effective atomic numbers and electron densities were also calculated. The calculated results show that the total mass attenuation coefficient decreased with increasing of gamma rays energy. The value of total mass attenuation coefficient of each material was different, which depend on chemical compositions of alloy. The partials interactions, effective atomic numbers and electron densities were also calculated and discussed.

Photon Interactions Study of Bi2O3-Na2O-CaO-SiO2-B2O3 Glasses

2016 ◽  
Vol 675-676 ◽  
pp. 443-446 ◽  
Author(s):  
Pruittipol Limkitjaroenporn ◽  
Wasu Cheewasukhanont ◽  
Kitipun Boonin ◽  
Jakrapong Kaewkhao
Keyword(s):  
Pair Production ◽  
Attenuation Coefficient ◽  
Photon Energy ◽  
Total Mass ◽  
Mass Attenuation Coefficient ◽  
Low Energy ◽  
Borosilicate Glasses ◽  
Photoelectric Absorption ◽  
Photon Interactions ◽  
Mass Attenuation

The Bi2O3 doped with soda lime borosilicate glasses in composition xBi2O3 : 15Na2O : 10CaO : 20B2O3 : (55-x)SiO2 at different concentrations (x = 0, 5, 10, 15, 20, 25 mol%) were studied the photon interactions. The total mass attenuation coefficient, coherent, incoherent, photoelectric absorption and pair production of prepared were studies using WinXcom Program at 1keV to 2MeV. The result of total mass attenuation coefficient and photoelectric absorption were decreases but discontinue because of photoelectric absorption edge at low energy. The photoelectric effect shows the main interaction at the low energy and decrease with increasing of photon energy. The higher photon energy the incoherent scattering found to be the main interaction. But at the photon energy 1.022 MeV, the pair production will be occurs and found to be the main interaction at the photon energy higher than 1.022 MeV.

Gamma radiation shielding properties of glasses within the TeO2-TiO2-ZnO system

2019 ◽  
Vol 107 (6) ◽  
pp. 517-522 ◽  
Author(s):  
M. Almatari
Keyword(s):  
Gamma Radiation ◽  
Attenuation Coefficient ◽  
Atomic Number ◽  
Effective Atomic Number ◽  
Mean Free Path ◽  
Mass Attenuation Coefficient ◽  
Radiation Shielding ◽  
Glass System ◽  
Shielding Properties ◽  
Mass Attenuation

Abstract Radiations are widely used in hospitals and health services in radiotherapy and molecular imaging using x-ray and gamma radiation which considered as the most penetrating radiations and very difficult to shield. In this study, the radiation shielding properties of different zinc oxide (ZnO) concentrations of the (95-x)TeO2-5TiO2-xZnO (x=5, 10, 15, 20, 25, 30 and 40 mol%) glass system was investigated to be introduced as a new transparency effective shielding material. In order to study shielding properties, mass attenuation coefficients in the energy range of 0.015–15 MeV photon energies for the current glass system were calculated using ParShield software. Moreover, half value layer, mean free path and effective atomic number were evaluated using the obtained attenuation coefficient. The results indicated that if ZnO was added to the current glass system the mass attenuation coefficient will be decreased as well as effective atomic number values. The highest mass attenuation coefficient at all energies was found to be in TT5Z5 glass sample as well as the effective atomic number value.

Gamma Radiation Method for the Determination of Density of Wood materials

2015 ◽  
Vol 5 (1) ◽  
pp. 17-21
Author(s):  
E. Rajasekhar ◽  
R. Jeevan Kumar ◽  
K. Vijay Sai ◽  
Sai Prem Shaji ◽  
B. V. Avinash ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Attenuation Coefficient ◽  
Mass Attenuation Coefficient ◽  
Relaxation Length ◽  
Attenuation Coefficients ◽  
60Co Source ◽  
Albizia Saman ◽  
Good Agreement ◽  
Mass Attenuation

Mass attenuation coefficients of ten different types of wood materials were determined using gamma radiation of 1332 keV from 60Co source. Two mathematical models have been developed for the prediction of density using variation with relaxation length and half value layer of wood materials. A good agreement was observed (greater than 83%) between the measured values and the predicted model 1 and 2. Results show that Azadiracta indica has the highest relaxation length and the lowest mass attenuation coefficient, while Albizia saman has the least relaxation length and the highest mass attenuation coefficient. Results also show that Azadiracta indica has the highest half value layer and Albizia saman has the least half value layer.

scholarly journals Representative Elementary Length to Measure Soil Mass Attenuation Coefficient

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
J. A. R. Borges ◽  
L. F. Pires ◽  
J. C. Costa
Keyword(s):  
Attenuation Coefficient ◽  
Gamma Ray ◽  
Clayey Soil ◽  
Physical Property ◽  
Soil Mass ◽  
Mass Attenuation Coefficient ◽  
Soil Bulk Density ◽  
Elementary Length ◽  
Increasing Demand ◽  
Mass Attenuation

With increasing demand for better yield in agricultural areas, soil physical property representative measurements are more and more essential. Nuclear techniques such as computerized tomography (CT) and gamma-ray attenuation (GAT) have been widely employed with this purpose. The soil mass attenuation coefficient (μs) is an important parameter for CT and GAT analysis. When experimentally determined (μes), the use of suitable sized samples enable to evaluate it precisely, as well as to reduce measurement time and costs. This study investigated the representative elementary length (REL) of sandy and clayey soils forμesmeasurements. Two radioactive sources were employed (241Am and137Cs), three collimators (2–4 mm diameters), and 14 thickness (x) samples (2–15 cm). Results indicated ideal thickness intervals of 12–15 and 2–4 cm for the sources137Cs and241Am, respectively. The application of such results in representative elementary area (REA) evaluations in clayey soil clods via CT indicated thatμesaverage values obtained forx > 4 cm and source241Am might induce to the use of samples which are not large enough for soil bulk density evaluations (ρs). As a consequence,ρsmight be under- or overestimated, generating inaccurate conclusions about the physical quality of the soil under study.

scholarly journals Estimation of the X/γ- ray shielding properties of different glass system using Monte Carlo Simulation

2021 ◽  
Vol 12 (2) ◽  
pp. 1117-1122
Author(s):  
Ayano Shanko, MD, Et. al.
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Attenuation Coefficient ◽  
Mass Attenuation Coefficient ◽  
Radiation Shielding ◽  
Glass System ◽  
Effective Electron ◽  
X Ray ◽  
Shielding Properties ◽  
Mass Attenuation

The aim of the research is to estimate the X-ray shielding properties of different glass systems using Monte Carlo Simulation. X-ray glass is also known as radiation shielding glass. Glass provides protection against the absorption of energy radiation. The shielding layer is formed by a high concentration of lead and barium. The mass attenuation coefficient, the effective atomic number and the effective electron density are used to determine the position of gamma-ray photons in matter. Shield characterization in terms of mass attenuation coefficient (μm), transmission fraction (T), effective atomic numbers (Zeff), half-value layer (HVL) and exposure build-up. factor (EBF) of a glass system is estimated by the Monte Carlo Simulation. The random sampling and statistical analysis are computed using the monte carlo simulation. Various external factors are considered as the input parameters. The different composition of the glass will be examined using the Monte Carlo simulation and the shielding capability would be determined for the various samples.

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