Investigation of Gamma Ray and Neutron Attenuation Coefficients for Granites Produced in Turkey

Ozyurt, O.; Altınsoy, N.; Büyük, B.

doi:10.12693/aphyspola.127.1268

Cited by 4 publications

(3 citation statements)

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“…The (µ/ρ) values are comparable for the three granites. Consequently, (µ) can provide clearer discrimination between granites, as a shielding material, than (µ/ρ), see also [9] and [14]. This can be correlated with the atomic numbers of the constituting atoms and the experimental set-up.…”

Section: The Linear and Mass Attenuation Coefficientsmentioning

confidence: 96%

“…It might be of benefit to indicate that the values of (µ) at photon energies 0.662, 1.173 and 1.332 MeV for Turkey granites lei in the ranges 0.148-0.341, 0.133-0.168, 0.129-0.158 cm -1 respectively. [14] To interpret for the large decrease of the attenuation coefficients from 0.081 to 0.356 MeV and smaller decrease at larger energies the ratio of attenuation by photo-electric effect to Compton scattering at E γ =0.81, 0.356, 0.662, 1.173 and 1.332 MeV is respectively ≅3.86×10 -1 , 3.96×10 -3 , 9.8×10 -4 , 3.69×10 -4 and 3.16×10 -4 and the ratio of attenuation by pair production to Compton scattering at 1.332 MeV is also ≅10 -3 . [15,19] It is obvious that the contribution of the photo-electric effect to the total mass attenuation coefficient is significant at the energy 0.081 MeV and appreciably decreases at larger energies.…”

Section: The Linear and Mass Attenuation Coefficientsmentioning

confidence: 99%

“…The shielding properties of granites which are produced in Turkey were studied for linear and mass attenuation coefficients of gamma rays at the energies 0.611, 1.173 and 1.332 MeV using NaI (Tl) detector. [14] The measurements were carried out in narrow and broad beam geometries. It was concluded that the highest linear attenuation coefficient belongs to Canakkale Grey, Giresun Vison and Akasari Pink at 0.662, 1.173 and 1.332 MeV respectively while Bergama Grey has the lowest values.…”

Section: Introductionmentioning

confidence: 99%

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Broad Beam and Gamma Spectrometric Parameters of Some Granites

El-Kateb¹,

El-Nasr²,

Bakry³

2019

RST

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Using a γ-ray spectrometer with 3"x3" NaI (Tl) detector the linear and mass attenuation coefficients (µ/ρ) and (µ b /ρ) from narrow and broad beam experimental arrangements have been measured and compared with the theoretical values for the granites Double Black, DB, from India, Rose Al-Howdy, RH, from Aswan, south Egypt and Bianco Halayeb, BK, from Halayeb, south Egypt. The photon energies lei in the range 0.081-1.332 MeV from the radioisotopes 133 Ba, 137 Cs and 60 Co. The build-up factor B, the effective atomic number Z eff , and the total atomic cross-section σ t for the granites as a function of photon energy were determined and discussed. It is found that the experimental results are consistent, within the experimental errors, with the theoretical values. The effective atomic number Z eff , the build-up factor B, and the total atomic cross-section σ t were calculated and discussed as a function of photon energy. The B factor is large at low gamma energy and not sensitive for discrimination between the granites. The maximum Z eff corresponds to minimum B factor at the photon energy 0.356 MeV. The broad beam geometry is more efficient than narrow beam geometry in characterizing the shielding properties of the studied granites.

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Section: The Linear and Mass Attenuation Coefficientsmentioning

confidence: 96%

Section: The Linear and Mass Attenuation Coefficientsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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