Results of geant4 Monte Carlo simulations carried out on the Budapest PGAA detector are presented in this paper. A complete set of detector response functions, i.e. the gamma spectra corresponding to incremental gamma-ray energies up to 12 MeV, were obtained by simulations and used to unfold the experimental gamma spectra of ⁶⁰Co and ¹⁵²Eu. The unfolding successfully removed the continuous Compton-background and the escape peaks related to a full-energy peak but preserved the shape and area of the peak itself. We finally demonstrated the applicability of this approach in determining the total radiative neutron capture cross-sections of the ¹⁴N(n, $\gamma$) reaction, where an excellent agreement with literature data was found.

本文介绍了在Budapest PGAA检测器上进行的geant4蒙特卡洛模拟的结果。通过模拟获得了完整的探测器响应函数集，即与高达12 MeV的增量伽马射线能量相对应的伽马光谱，并将其用于展开⁶⁰ Co和¹⁵² Eu的实验伽马光谱。展开成功地去除了连续的康普顿背景和与全能量峰有关的逃逸峰，但保留了峰本身的形状和面积。我们最终证明了该方法在确定¹⁴ N（n，$\gamma$）反应，与文献数据非常吻合。