论文部分内容阅读
文章作者采用核活化法和核裂变法实验研究了加速器D-T中子、D-D中子以及252Cf自发裂变中子在纯水泥体上的反射中子,获得了反射中子引起的6种高阈能活化箔的活化反应率以及235U(包镉)和238U裂变反应率.采用反冲质子法测量了4种厚度(4.5,9,18,27cm)聚乙烯板的角度中子谱.获得了聚乙烯铁铍组合壳体内距装置中心0,9.7,12.8和17.3cm 4个位置1MeV以上的中子能谱。采用铝核素标准截面相对测量法,获得了175Lu、89Y核素的(n,2n)反应截面。文章还分析了实验的不确定度.
The authors used the nuclear activation method and the nuclear fission method to experimentally study the neutron, DD neutron and 252Cf spontaneous fission neutron accelerator neutron neutron neutron neutron neutron neutron on pure cement body obtained by the reflection neutron 6 kinds of high threshold energy activation Foil activation reaction rate and 235U (including cadmium) and 238U fission reaction rate.The recoil proton method was used to measure the angle neutron spectrum of four kinds of polyethylene (4.5,9,18,27cm) Beryllium composite shell within the device from the center 0,9.7,12.8 and 17.3cm 4 position 1MeV above neutron spectrum. The (n, 2n) reaction cross section of 175Lu and 89Y nuclides was obtained by the relative measurement method of standard section of aluminum nuclide. The article also analyzes the experimental uncertainty.