Yazar "Deghfel, B." seçeneğine göre listele
Listeleniyor 1 - 5 / 5
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Average M Shell Fluorescence Yields for Elements with 70?Z?92(Amer Inst Physics, 2015) Kahoul, A.; Deghfel, B.; Aylikci, V.; Aylikci, N. K.; Nekkab, M.The theoretical, experimental and analytical methods for the calculation of average M-shell fluorescence yield ((omega) over barM) of different elements are very important because of the large number of their applications in various areas of physical chemistry and medical research. In this paper, the bulk of the average M-shell fluorescence yield measurements reported in the literature, covering the period 1955 to 2005 are interpolated by using an analytical function to deduce the empirical average M-shell fluorescence yield in the atomic range of 70 <= Z <= 92. The results were compared with the theoretical and fitted values reported by other authors. Reasonable agreement was typically obtained between our result and other works.Öğe Calculation of K-Shell Fluorescence Yields for Low-Z Elements(Amer Inst Physics, 2015) Nekkab, M.; Kahoul, A.; Deghfel, B.; Aylikci, N. Kup; Aylikci, V.The analytical methods based on X-ray fluorescence are advantageous for practical applications in a variety of fields including atomic physics, X-ray fluorescence surface chemical analysis and medical research and so the accurate fluorescence yields (omega(K)) are required for these applications. In this contribution we report a new parameters for calculation of K-shell fluorescence yields (omega(K)) of elements in the range of 11 <= Z <= 30. The experimental data are interpolated by using the famous analytical function (omega(K)/(1-omega(K)))(1/q) (were q=3, 3.5 and 4) vs Z to deduce the empirical K-shell fluorescence yields. A comparison is made between the results of the procedures followed here and those theoretical and other semi-empirical fluorescence yield values. Reasonable agreement was typically obtained between our result and other works.Öğe New empirical formulae for calculation of average M-shell fluorescence yields(Pergamon-Elsevier Science Ltd, 2014) Kahoul, A.; Aylikci, V.; Deghfel, B.; Aylikci, N. Kup; Nekkab, M.We have calculated and reviewed in a table form the average bulk M-shell fluorescence yield previously measured by different groups covering the period from 1955 to 2005. We have interpolated the weighted and unweighted mean values of the experimental data by using the analytical function ((omega) over bar (M)/(1-(omega) over bar (M)))(1/4) as a function of the atomic number (Z) to deduce the empirical average M-shell fluorescence yield in the atomic range of 70 <= Z <= 92. Also, we used the famous formula (omega) over bar (M) = A(Z-13)(4) to generalize the average M-shell fluorescence yield for elements with 19 <= Z <= 100. The results have been compared with other theoretical, experimental and empirical values reported in the literature and a reasonable agreement has been obtained. (C) 2014 Elsevier Ltd. All rights reserved.Öğe New procedure calculation of photon-induced K?/K? intensity ratios for elements 16S to 92U(Elsevier Science Bv, 2014) Kahoul, A.; Aylikci, N. Kup; Aylikci, V.; Deghfel, B.; Kasri, Y.; Nekkab, M.In this paper, the measured Kb/Ka intensity ratio values published in the literature from 1980 to 2011 have been reported. The weighted- and unweighted- mean values of the experimental data were fitted by the analytical function to deduce new semiempirical and empirical intensity ratios in the atomic range of 16 <= Z <= 92. The semi-empirical intensity ratios were then deduced by fitting the experimental data normalized to their corresponding theoretical values and the experimental data were directly fitted to deduce the empirical ones. The results were compared with the other theoretical and experimental values reported in the literature. Copyright (C) 2014, The Egyptian Society of Radiation Sciences and Applications. Production and hosting by Elsevier B.V. All rights reserved.Öğe Ytterbium to thorium semi-empirical average M-shell fluorescence yields(Pergamon-Elsevier Science Ltd, 2015) Khalfallah, F.; Deghfel, B.; Kahoul, A.; Aylikci, V.; Aylikci, N. Kup; Nekkab, M.By using the weighted and unweighted mean values of the experimental average M-shell fluorescence yield reported in the literature covering the period from 1955 to 2005 and the theoretical values based on the non-relativistic Hartree-Fock-Slater (HFS) calculations of McGuire (1972), we produce good estimations for the semi-empirical values of elements in the range of 70 <= Z <= 90. These values are obtained by the interpolation of the normalized weighted and unweighted mean values to their corresponding theoretical ones. The results have been compared to other theoretical, empirical and experimental data reported in the literature. Reasonable agreement has been obtained between our result and other works. (C) 2015 Elsevier Ltd. All rights reserved.
