Investigation for Thorium Activity levels by using semiemperical equation for γ-ray Energy of (511)keV

Abstract

In this work a new method for determining the specific activity for Thorium-232 was applied by using γ-energy of 511 keV. This method was a semiemperical equation related to the system we used it (γ -spectroscopy).It helps us to get the specific activity of Thorium at low level count or even under the detection limit of the system.The efficiency of the detector for 511 keV that make the peak visible in the spectrum and help us to make our calculation