Structure Effect on K Shell Fluorescence Parameters at Bis-4-Bromobenzyl-1,2,4-Triazol-3-Ones.

In this study; the effect of the electron density over the Br atoms raising with increasing number of CH2 group using the results of the K X-ray cross-sections and average fluorescence yields of bromine in quaternary-imidazole ring. In the experimental set-up, 50 mCi (241)Am source and a collimated Ultra-LEGe detector were used. The electron density on the Br atoms raises according to the number of the CH2 groups on the contrary of the inductive effect. The decreasing of the X-ray fluorescence parameters is interested with the increasing the electron density of Br atoms.

L shell X-ray fluorescence parameters of Pb in phthalocyanine complexes.

The L shell X-ray intensity ratios Li/Lα (i=l, ß and γ), the production cross-sections σ(Li) (i=l, α, ß and γ) and the L3 subshell fluorescence yields ω(L3) have been investigated for the element Pb in the phthalocyanine complexes. The measurements have been performed using an (241)Am annular radioactive source and an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. The experimental values have been compared with the theoretical values of pure Pb element.

K shell and L subshell photoeffect cross-sections of some elements in the atomic range 50≤Z≤65 at 59.5 keV.

In this study, K and L shell photoeffect cross-sections were measured for the elements in the range of 50≤Z≤65 at 59. 5 keV. These photoeffect cross-sections were measured by using the experimental σKα, production cross-section values measured in this paper and two different K shell fluorescence yield values in the literature. The results were compared with the calculated theoretical values. The values were plotted versus atomic number.