الفهرس 
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Abstract
In the field of radiation physics,measuring and studying the energy gamma spectra emitted from radioisotopes are very important and have many applications in different fields of sciences.as an example:the study of nuclear structure,the identification of radio-isotopes and their intenesities,estimating the absorbed doses and the determination of interaction cross-sections.where gamma rays are eigher incident or out going from the reaction.therefore,gamma-ray spectroscopy is very important factor and has to be determinded with high accuracy.