%0 Journal Article %A A. H. Fatah and A. H. Ahmed %D 2011 %J International Journal of Physical and Mathematical Sciences %B World Academy of Science, Engineering and Technology %I Open Science Index 49, 2011 %T Analysis of Gamma-Ray Spectra Using Levenberg-Marquardt Method %U https://publications.waset.org/pdf/3905 %V 49 %X Levenberg-Marquardt method (LM) was proposed to be applied as a non-linear least-square fitting in the analysis of a natural gamma-ray spectrum that was taken by the Hp (Ge) detector. The Gaussian function that composed of three components, main Gaussian, a step background function and tailing function in the lowenergy side, has been suggested to describe each of the y-ray lines mathematically in the spectrum. The whole spectrum has been analyzed by determining the energy and relative intensity for the strong y-ray lines. %P 18 - 23