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98Mo是一种重要的聚变堆包层材料。因此,准确测量它的中子俘获截面数据对于堆的设计和辐射防护具有重要意义,为此在四川大学2.5 MeV静电加速器上,以7Li(p,n)7Be和T(p,n)3He反应作为中子源,以197Au作为标准,用相对活化法测量了98Mo(n,γ)99Mo在29~1100keV能区中子俘获截面,并用MCNP 4C程序对实验中由中子的多次散射、注量率衰减效应等引起的偏差进行了修正,最后将所得结果与已有数据进行了比较。
98Mo is an important fusion reactor cladding material. Therefore, accurate measurement of its neutron capture cross-section data is of great significance for the design and radiation protection of the reactor. For this purpose, 7Li (p, n) 7Be and T (p, n) 3He react at 2.5 MeV electrostatic accelerator in Sichuan University As a neutron source, using 197Au as a standard, the neutron capture cross section of 98Mo (n, γ) 99Mo at 29-1100 keV was measured by the relative activation method and the MCNP 4C program was used to measure the neutron scattering in the experiment The rate of attenuation caused by the rate of error has been amended, and finally the results obtained with the existing data were compared.