The knowledge of the interaction of photons with matter is of vital importance to investigate fundamental nuclear physics problems. Giant dipole resonance (GDR) mechanism is dominant up to 30 MeV at photo-absorption cross-section. The photo-absorption cross-section curve against the photon energy displays one or multi-peak Lorentzian functions according to the deformation of the nucleus. Theoretical photo-absorption cross-section calculations generally focus on the estimation of GDR parameters. Theoretical reaction codes use GDR parameters to reproduce photon-induced nuclear reactions. In this study, photo-neutron cross-section calculations of ^54,56Fe, ^90,91,92,94Zr, ⁹³Nb, and ¹⁰⁷Ag isotopes have been done with the TALYS 1.8 and EMPIRE 3.2.2 nuclear reaction codes in the GDR region. During these calculations, both codes were firstly operated by using the predefined and existing GDR parameters within the codes. Later on, a new set of GDR parameters have been obtained by running a Lorentzian model based code in where the available experimental data are also considered. Levenberg-Marquardt algorithm has been used with 10⁻⁶ function tolerances and 400 iterations for optimization. These new obtained GDR parameters then replaced with the existing GDR parameters within the TALYS code and the photo-neutron cross-section calculations for the investigated isotopes have been repeated. Ultimately, in order to discuss the outcomes and the effects of using new GDR parameters, obtained results were analyzed by comparing them with the experimental data from the Experimental Nuclear Reaction Data (EXFOR) library.

光子与物质相互作用的知识对于研究基本的核物理问题至关重要。在光吸收截面处，高达30 MeV的巨子偶极共振（GDR）机制占主导地位。相对于光子能量的光吸收截面曲线根据原子核的形变显示一个或多个峰值洛伦兹函数。理论光吸收截面的计算通常着重于GDR参数的估计。理论反应代码使用GDR参数来重现光子诱发的核反应。在这项研究中，光中子截面计算为^54,56 Fe，^90,91,92,94 Zr，⁹³ Nb和¹⁰⁷Ag同位素已在GDR地区使用TALYS 1.8和EMPIRE 3.2.2核反应代码完成。在这些计算过程中，首先使用代码中的预定义和现有GDR参数来操作这两个代码。后来，通过运行基于Lorentzian模型的代码获得了一组新的GDR参数，其中还考虑了可用的实验数据。Levenberg-Marquardt算法已用于10 ^-6功能公差和400次迭代进行优化。然后，将这些新获得的GDR参数替换为TALYS代码中的现有GDR参数，并重复了所研究同位素的光中子截面计算。最终，为了讨论使用新GDR参数的结果和效果，将获得的结果与来自实验核反应数据（EXFOR）库的实验数据进行了比较，对其进行了分析。