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An Experimental Evaluation of the Atomic Number Effect
Advances in X-ray Analysis, 1973AbstractA method for measuring the atomic number effect is developed using a sandwich sample technique. The depth distributions of x-ray production, ϕ(ρz) curves, have been measured for a zinc tracer in aluminum, copper, silver and gold matrices at 30, 25, 20 and 15 keV. The ϕ(ρz) curves were measured using a Cambridge Microscan 5 in which the electron
L. Parobek, J. D. Brown
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Effective principal quantum numbers of valence atomic orbitals
Chemical Physics Letters, 1971Abstract Analysis of radial moments of Hartree-Fock atomic orbitals shows that their shape near the radial maximum implies an effective principal quantum number that remains small even for heavier elements.
L.C. Cusachs, H.S. Aldrich
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Effective atomic numbers for materials of dosimetric interest
Radiation Physics and Chemistry, 1997Abstract Effective atomic numbers ( Z eff ) for different materials of dosimetric interest have been calculated for total photon interaction in the energy region 1 keV–20 MeV. The calculations are made using the mass attenuation coefficients data from Tables of X-ray Mass Attenuation Coefficients and Mass Energy-absorption Coefficients 1 keV to ...
T.Kiran Kumar, K.Venkata Reddy
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Journal of Fusion Energy, 2014
The effective atomic weight, A eff , mass attenuation coefficients, μ/ρ, half-value layer, HVL, effective atomic numbers, Z eff and effective electron densities, N eff of hydride and borohydirde metals,
Vishwanath P. Singh, N. M. Badiger
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The effective atomic weight, A eff , mass attenuation coefficients, μ/ρ, half-value layer, HVL, effective atomic numbers, Z eff and effective electron densities, N eff of hydride and borohydirde metals,
Vishwanath P. Singh, N. M. Badiger
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Effective Atomic Numbers of Heterogeneous Materials
Nature, 1965FOR a single element, the three γ-ray processes—photoelectric, Compton and pair production, can be expressed as a function of photon energy hν and the atomic number Z of the element. At a given photon energy, the interaction is proportional to Zn where n is between 4 and 5 for the photoelectric effect, 1 for the Compton effect, and 2 for pair ...
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Effective atomic numbers of alloys from bremsstrahlung measurements
Il Nuovo Cimento B, 1977The effective atomic numbers of three alloys Cu-Ag, Cu-Sn and Sn-Pb were determined by measuring the external-bremsstrahlung (EB) total yields produced in those alloys and also in the constituent elements due to the stoppage in them of the continuous beta-radiation from32P,45Ca,169Er and185W.
V. V. V. Subrahmanyam +2 more
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Radiation Protection Dosimetry, 2012
In this study, the total mass attenuation coefficients (μ(m)) for some homo- and hetero-chain polymers, namely polyamide-6 (PA-6), poly-methyl methacrylate (PMMA), low-density polyethylene (LDPE), polypropylene (PP) and polystyrene (PS) were measured at 59.5, 511, 661.6, 1173.2, 1274.5 and 1332.5 keV photon energies.
Küçük, Nil +2 more
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In this study, the total mass attenuation coefficients (μ(m)) for some homo- and hetero-chain polymers, namely polyamide-6 (PA-6), poly-methyl methacrylate (PMMA), low-density polyethylene (LDPE), polypropylene (PP) and polystyrene (PS) were measured at 59.5, 511, 661.6, 1173.2, 1274.5 and 1332.5 keV photon energies.
Küçük, Nil +2 more
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Effective Atomic Number and Energy Absorption in Tissues
The British Journal of Radiology, 1946An X-ray absorption method, using Ross balanced filters, is applied to measure the effective atomic number of excised body tissues. The results are used to calculate linear absorption coefficients and the true energy absorption in ergs per rontgen for these tissues over a wide range of wavelength.
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Effective atomic number and electron density of marble concrete
Journal of Radioanalytical and Nuclear Chemistry, 2012The effective atomic numbers (Z eff) and effective electron density (N e) of different type concrete have been measured and the results were compared with the calculation obtained using the mass attenuation coefficients (μ/ρ) obtained via XCOM in the photon energy range of 1 keV–100 GeV.
El-Khayatt, A. M., AKKURT, İskender
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Energy dependence of the effective atomic number of alloys
International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1991Abstract To investigate the variation of effective atomic number ( Z eff) of alloys with photon energy, the Z eff of eight different alloys (tungsten steel, monel metal, solder, bell metal, bronze aluminium, bronze ordinary, platinum-rhodium-I and platinum-rhodium-II) have been studied for the total and partial photon interaction processes over ...
Gurmel S. Mudahar +2 more
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