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在实验中应用Ge(Li)探测器时,应确切了解测定γ射线能量的误差,这一点在各方面的应用中有重要作用。例如通过热中子(n,γ)反应研究核能级纲图时,根据Ritz原理,产生假能级的几率正比于γ射线能量的误差。因而能量误差越小,能级可靠性就越高。在瞬发和缓发中子活化分析中,要知道γ射线能量以便更好的分辨各种元素。 γ射线能量误差来源于;Ge(Li)探测系统输出的信号辐度与入射γ光子能量间的非线性,仪器的漂移,峰位拟合误差和几何效应引起的误差。几何效应是由于源的体积大
When using Ge (Li) detector in experiment, it is necessary to know exactly the measurement error of γ-ray energy, which plays an important role in all aspects of application. For example, when studying the nuclear energy level diagram by the thermal neutron (n, γ) reaction, the probability of generating a pseudo-energy level is proportional to the error of the γ-ray energy according to the Ritz principle. Therefore, the smaller the energy error, the higher the level reliability. In instantaneous and delayed neutron activation assays, you know the gamma energy to better distinguish the various elements. The energy error of γ-ray comes from the error caused by the nonlinearity between the signal radiance output by the Ge (Li) detection system and the energy of incident γ-photon, the drift of the instrument, the fitting error of the peak position and the geometric effect. The geometric effect is due to the bulky source