中国原子能科学研究院建造了一套γ全吸收型BaF_2探测装置(GTAF,γ-ray Total Absorption Facility),目标是对相关核素的(n,γ)反应截面进行高精度测量。应用γ全吸收型探测装置、瞬发γ射线测量方法,对中子辐射俘获(n,γ)反应截面进行实验测量,利用(n,γ)反应的1个特征,即对于某一特定入射中子能量,对应的靶核反应形成的复合核的激发能是确定的,复合核退激时释放出的瞬发级 China Institute of Atomic Energy has built a γ-ray Total Absorption Facility (γ-ray Total Absorption Facility) with a target of high-precision measurement of the (n, γ) cross section of the relevant nuclide. Γ full absorption detector and instantaneous γ ray measurement method were used to measure the cross section of neutron radiation capture (n, γ) reaction. One feature of (n, γ) reaction was used, that is, for a specific incident The sub-energy, corresponding to the nuclear reaction of the target nucleus formed by the excitation energy is determined, the recombination nucleus when the release of the instantaneous level