Hasan Erdogan

Chemical-effect variation of Kβ/Kα X-ray intensity ratios in 3d elements

Abstract Chemical effects on K β /K α X-ray intensity ratios for some Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn compounds are studied experimentally. The X-ray spectra were measured by using a Si (Li) solid state detector with high resolution. The vacancies were produced by heavily filtered 241 Am gamma rays. It is found that the K β /K α X-ray intensity ratios measured with compounds deviated up to 43% from the corresponding values of the pure elements. The values for pure elements are compared with the other experimental and with theoretical values.

Measurement of atomic L shell Coster-Kronig yields (f12, f23 and f13) for some elements in the atomic number range 59⩽Z⩽90

Non-radiative transitions cause changes in the generation of the intensity of the L lines. In order to investigate the physical quantities relevant to the L lines affected by the non-radiative transitions, experimental measurements were carried out using a Si(Li) x-ray spectrometer. Atomic L shell Coster-Kronig yields (f12, f13 and f23) for some elements in the atomic number range 59≤Z≤90 were determined. These selected measured semi-empirical values were also fitted by least squares to polynomials in Z of the form ∑nanZn (except for f13) and compared with theoretical and with earlier fitted values.

Measurement of atomic L shell fluorescence (ω1, ω2, ω3) and Auger (a1, a2 and a3) yields for some elements in the atomic number range 59≤Z≤85

Abstract A comprehensive set of theoretical Coster–Kronig and fluorescence yields are presented for atomic numbers 18≤Z≤100. These quantities are based on ab initio relativistic calculations. Agreement with experimental values is fair for ω1 and generally good for ω2, ω3 (Z≥54) [1] . Therefore, atomic L shell fluorescence (ω1, ω2, ω3) and Auger yields (a1, a2 and a3) for some elements in the atomic number range 59≤Z≤85 were determined. These selected measured semi-empirical values were also fitted by least squares to polynomials in the Z of the form ∑nanZn and compared with theoretical and with earlier fitted values.

Angular Dependence of Differential Cross-Sections of L X-Rays from Hg, TI, and Pb at 59.5 keV

Introduction According to Cooper and Zare [l], spatial distribution of X-ray emission for different magnetic substrates is always isotropic, but in the theoretical calculations of Flugge et al. [2], it is shown that spatial distribution of X-rays is different for different magnetic substrates. The Xrays originating from the states corresponding to J = 1/2 (K shell and L1, L2, M1, M2, subshell, etc.) are expected to be isotropic and those corresponding to state J = 3/2 (L2, M3, M4, subshell, etc.) and J = 5/2 (M5 subshell, etc.) are expected to be anisotropic in their spatial distribution. The angular distributions of ion-induced [3–7] and photon-induced [8–10] L X-rays were investigated for some elements. We have measured differential cross-sections of L shell X-rays from Hg, T1, and Pb at different angles varying from 45° to 135° at 15° intervals.

Anisotropy ofL-shell X-rays in Au and Hg excited by 59.5 keV photons

SummaryThe anisotropy of emission intensity ofL-shell X-rays induced by 59.5 keV photons in Au and Hg was investigated at different angles varying from 45° to 135°. It is observed thatLl andLα X-rays (originating fromJ=3/2) are anisotropic,Lβ andLγ X-rays (originating fromJ=1/2, commonly) are isotropic.

Calculation of average L shell fluorescence yields for the elements with 25< Z <101

AbstractAverage L shell fluorescence yield

Angular Dependence of L X-ray Relative Intensities of Uranium and Thorium at 59.5 keV

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Micro-Raman and FT-IR spectroscopic studies of ceramic shards excavated from ancient Stratonikeia city at Eskihisar village in West–South Turkey

, average L shell Auger yields