en عمومى General پژوهشي Research <p dir="ltr" style="text-align: justify">In this research, Ag nanoparticles were prepared by using <em>g</em>-radiation at concentration of 5.18×10^-3 M and irradiated at different doses. A green laser was employed as excited source for measuring nonlinear refractive index and absorption coefficient. The measurements were done by z-scan method for both, closed and open aperture at temperature room. We deduced that with growth of size of Ag nanoparticles, nonlinear refractive index increased while absorption coefficient of samples decreased</p> Optical properties, Nonlinear refractive index, Ag nanoparticles, Z-scan method. 107 114 http://ijop.ir/browse.php?a_code=A-10-446-1&slc_lang=en&sid=1 Esmaeil Shahriari esmaeil.phy@gmail.com 10031947532846001371 10031947532846001371 Yes SHahrekord Uni. Mohammad Moradi morardi@sci.slu.ac.ir 10031947532846001372 10031947532846001372 No SHahrekord Uni. Mohsen Ghasemi Varnamkhasti m_gh_v@yahoo.com 10031947532846001373 10031947532846001373 No SHahrekord Uni.