دراسة تجريبية لامتصاصية بعض المواد - الزركونيوم الكربون والفضة للأشعة السينية

Abstract

In this study, x- ray absorption properties for some elements were studied. A three different types of bulk materials of elements (C, Zn, and Ag ) having the same thickness (0.05cm) were used in this study.The pulses rate per second records (R/S) from the Gigger Muller Tube (GMT) counter attached in the x-ray apparatus were studied for different accelerating potentials (25,30 and 35kv), and that is to investigate effect of those potentials on quantity of x-ray pass through the bulk material element under test, Moreover, pulses rate per second records were studied by fixing the accelerating potentialinto a value of 35kV, and varying the source current into values of (0.06,0.8 and1.0 mA, respectively). Results showed that there was a direct proportionality relation between pulses rate per second and applied accelerating potentialfor all bulk material elements: C, Zn, and Ag;while there was a direct proportionality relation between pulse rate per second and source current for bulk heaviest materials: Zn and Ag,in contrast to that, there was an inverse proportionality relation between pulses rate per second and the applied source current for the lightest bulk material of element C, this might be explained for due to the smallvalue of the absorption coefficient of carbon in comparison to other elements the contribution of absorption is weak. Finally,x-ray was subjected to the three bulk material elementsusing accelerating potentials (25, 30 and 35kV,respectively) and source current 1 mA for heavy elements (Ag, zr) and 0.02 mA for lightest element (C),that is in order to calculate linear absorption coefficient for all those elements; the previous steps were repeated by fixing accelerating potential and source current(35 KV and 1mA). Results showed that linear absorption coefficient depend on atomic number