Abstract

• Nowadays, alpha Spectroscopy system is very popular and widely used radionuclide assay method in human resources and various research topics. The alpha particles are emitted from the well of the nucleus. Alpha spectroscopy is important role in the identification of radioisotope, radiation protection and radiation therapy in which alpha particle have the ability to deliver their energies to the target. In this research work, characteristics of α-radiation in different density materials were investigated by using silicon semiconductor detector and α-radiation sources: 241 Am and 226Ra. In the present study, the measurement of alpha spectroscopy was performed for the determination of α-radiation characteristic such as energy loss, range, stopping power and effective path length not only in air medium but also in aluminum (Al) and gold (Au) foils samples of 8µm and 2µm respectively. Radionuclide Identification (RID) program is created in this research work. The measured spectra were analyzed by using this program based on the CASSY Lab and MATLAB software packages. Moreover, the experimental results data were compared with the theoretical calculated values by using Geiger Law, Bragg’s Law and Bethe-Bloch formula. The results data from the measurement were found in good agreement with the theoretical values less than 10%.