Determination of some fluorescence parameters of L sub-shells for Th and U at 59.54 keV photon energy.

The L X-ray fluorescence cross-sections at 59.54 keV, L sub-shell fluorescence and Auger yields, L sub-shell level widths, life times and some selected radiative transfer probabilities of L to M, N and O sub-shells were determined using Energy Dispersive X-ray Fluorescence for Th and U. The experiments were performed with a Si(Li) detector and an Am-241 radioactive annular source in excitation geometry. The results are in good agreement with other comparable values within experimental uncertainties.

Quantitative EDXRF analysis of Ca, K, Mn and Na in normal and pathological adult-human teeth.

This work relates to the measurement of calcium, potassium, manganese and sodium levels in adult-human teeth from female and male patients and normal subjects. Energy dispersive X-ray fluorescence (EDXRF) technique was used for the measurements. Pathological and non-pathological adult-human teeth samples were collected from one male human patient and one female human patient who attended the dental clinic. The standard addition method was used to determine concentrations. Experimental results are presented and discussed in this work.