Hossam Bahy El-Din Alaa El-Din


The non-destructive gamma-ray transmission technique has been established in different research laboratories to promote and enhance studies for monitoring the quality of environmental samples and mineral ores. The present measurements in this field have been performed using a y-ray spectroscopy system based on 5x5cm Na(TC) scintillation detector and 137Cs (662 keV y-line) of activity 0.37 GI3q (lOmCi) source. To carry out these measurements, the one source and the two source methods have been employed. Several material samples were prepared and used for calibration measurements and evaluation of the transmission methods. Pure elements of different thicknesses are used, e.g. AI, Cu, Ta, Cd, Pb as well as some of their oxides. Research samples were selected among various material compounds and ores (e.g. Perspex, Polyethylene, pure Polyvinyl chloride and doped with different concentration of Al203, Coke, Gypsum and Cement). The raw data of y-transmission for those samples are treated, evaluated and discussed. This photon transmission non-destructive technique has been employed using low y-energy source of 241Am (59.5 keV y-line) to investigate alloys (Al/Cu & Al/Mg) of known compositions. This were done to test the validity of the method and to estimate the percentage composition values of each individual element. It has been found that there is a good agreement between the percentage composition values evaluated and the experimental results for both the alloys. This technique, its theoretical basis and its application along with the results are discussed and presented. The use of positron annihilation lifetime (PAL) and Doppler broadening annihilation radiation (DBAR) techniques have been proposed, in the present

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Other Titles دراسة بعض الخواص الفيزيائية لمواد مختلفة باستخدام تقنيات نووية غير مدمرة
Issue Date 2006

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