Photon Attenuation Coefficients and Exposure Buildup Factor for HAP-Fe 2O 3 Composite Materials

2021 ◽  
Author(s):  
Iskender Akkurt ◽  
Roya Boodaghi Malidarre ◽  
Gazmend Nafezi ◽  
Nurdan Karpuz ◽  
Meltem Imamoglu ◽  
...  
Keyword(s):  
Composite Materials ◽  
Buildup Factor ◽  
Attenuation Coefficients ◽  
Photon Attenuation

Experimental investigation of photon attenuation parameters for different binary alloys

2019 ◽  
Vol 107 (4) ◽  
pp. 339-348 ◽  
Author(s):  
Mohammed I. Sayyed ◽  
Ferdi Akman ◽  
Mustafa Recep Kaçal
Keyword(s):  
Gamma Radiation ◽  
Atomic Number ◽  
Radiation Shielding ◽  
Buildup Factor ◽  
Alloy Sample ◽  
Attenuation Coefficients ◽  
Radiation Attenuation ◽  
Photon Attenuation ◽  
Mass Attenuation Coefficients ◽  
Mass Attenuation

Abstract Recently, technologists try to develop novel gamma radiation shielding materials instead of traditional materials such as lead and concrete with improved performance in gamma radiation shielding in medical applications and nuclear reactors. For this purpose, alloys such as stainless steel (SS) and carbon steel (CS) attracted much attention, these days. Preliminary results on such alloys have shown better attenuation of γ rays as compared to traditional shielding materials. This work aimed to conduct research on different alloy samples to evaluate their radiation attenuation efficiency and their suitability for radiation shielding when utilized in nuclear facilities. The mass attenuation coefficients for eight alloy samples were measured at different photon energies ranging from 80.997 to 1332.501 keV using transmission geometry. From the mass attenuation coefficients, different photon attenuation parameters such as half value layer, mean free path, effective atomic number, and radiation protection efficiency were evaluated. In addition, the equivalent atomic number and the exposure buildup factor were calculated using G-P fitting method for photon energy ranging from 0.015 MeV to 15 MeV at different penetration depth. The results showed that the Zeff values remain almost constant for all samples except W72/Cu28 in which the Zeff for this sample tends to decrease with the energy. The lowest value of half value layer is found for the alloy sample Ta97.5/W2.5 and the highest value is found for the alloy sample In50/Sn50. The Ta97.5/W2.5, Ta90/W10, Ta95/W5 samples demonstrated good radiation attenuation properties.

Photon attenuation coefficients of concrete includes barite in different rate

2010 ◽  
Vol 37 (7) ◽  
pp. 910-914 ◽  
Author(s):  
I. Akkurt ◽  
H. Akyıldırım ◽  
B. Mavi ◽  
S. Kilincarslan ◽  
C. Basyigit
Keyword(s):  
Attenuation Coefficients ◽  
Photon Attenuation

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

2018 ◽  
Vol 148 ◽  
pp. 86-94 ◽  
Author(s):  
Shamsan S. Obaid ◽  
M.I. Sayyed ◽  
D.K. Gaikwad ◽  
Pravina.P. Pawar
Keyword(s):  
Gamma Ray ◽  
Buildup Factor ◽  
Attenuation Coefficients

Determination of Photon Attenuation Coefficients of Steel Doped Barite Plasters

2019 ◽  
Vol 11 (11) ◽  
pp. 1075-1078
Author(s):  
İskender Akkurt ◽  
Kadir Günoğlu ◽  
Şemsettin Kılınçarslan
Keyword(s):  
Experimental Measurement ◽  
Computer Code ◽  
Gamma Spectrometer ◽  
Attenuation Coefficients ◽  
Photon Attenuation ◽  
Decorative Material ◽  
Radioactive Sources

The plaster is used as a flattening of the interior and exterior surfaces of the buildings and as decorative material. In this study, photon attenuation coefficients of barite plaster containing steel were measured. The measurements performed at 511, 835 and 1275 keV which are obtained from 22Na and 54Mn radioactive sources, using a gamma spectrometer that contains a NaI(Tl) detector and MCA. The measured results were compared with the calculation obtained using computer code of XCOM for 1 keV–1 GeV gamma energies. Also, half value layer (HVL) and tenth value layer (TVL) were calculated using the results obtained from the experimental measurement.

scholarly journals Enhancement of Bentonite Materials with Cement for Gamma-Ray Shielding Capability

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4697
Author(s):  
Ahmed M. El-Khatib ◽  
Mohamed Elsafi ◽  
Mohamed N. Almutiri ◽  
R. M. M. Mahmoud ◽  
Jamila S. Alzahrani ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Mean Free Path ◽  
Radiation Shielding ◽  
Point Sources ◽  
Linear Attenuation Coefficient ◽  
Buildup Factor ◽  
Chemical Compositions ◽  
Attenuation Coefficients ◽  
Water Holding ◽  
Mixed Samples

The gamma-ray shielding ability of various Bentonite–Cement mixed materials from northeast Egypt have been examined by determining their theoretical and experimental mass attenuation coefficients, μm (cm2g−1), at photon energies of 59.6, 121.78, 344.28, 661.66, 964.13, 1173.23, 1332.5 and 1408.01 keV emitted from 241Am, 137Cs, 152Eu and 60Co point sources. The μm was theoretically calculated using the chemical compositions obtained by Energy Dispersive X-ray Analysis (EDX), while a NaI (Tl) scintillation detector was used to experimentally determine the μm (cm2g−1) of the mixed samples. The theoretical values are in acceptable agreement with the experimental calculations of the XCom software. The linear attenuation coefficient (μ), mean free path (MFP), half-value layer (HVL) and the exposure buildup factor (EBF) were also calculated by knowing the μm values of the examined samples. The gamma-radiation shielding ability of the selected Bentonite–Cement mixed samples have been studied against other puplished shielding materials. Knowledge of various factors such as thermo-chemical stability, availability and water holding capacity of the bentonite–cement mixed samples can be analyzed to determine the effectiveness of the materials to shield gamma rays.

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

Materials ◽  
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.

Effective photon attenuation coefficients for heterogeneous media

1978 ◽  
Vol 44 (1) ◽  
pp. 94-96
Author(s):  
V. A. Artsybashev ◽  
E. P. Leman
Keyword(s):  
Heterogeneous Media ◽  
Attenuation Coefficients ◽  
Photon Attenuation
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