<SUP>75</SUP>As中子辐射俘获截面的实验测量及蒙特卡罗修正

⁷⁵As中子辐射俘获截面的实验测量及蒙特卡罗修正

摘要: 在四川大学2.5 MV静电加速器上，用活化法测量了29—1 100 keV 能区中子引起的⁷⁵As(n， γ)⁷⁶As反应截面，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。 We have measured the neutron radiative capture cross section of ⁷⁵As in the energy range of En=29—1 100 keV using the activation technique at 2.5 MV electrostatic accelerator of Sichuan University. The experimental data were then corrected for multiple scattering and selfshielding effects with MCNP 4C code. We also compared our results， with the existing measurement， calculation and evaluated data in ENDF/BⅥ.

Abstract: We have measured the neutron radiative capture cross section of ⁷⁵As in the energy range of En=29—1 100 keV using the activation technique at 2.5 MV electrostatic accelerator of Sichuan University. The experimental data were then corrected for multiple scattering and selfshielding effects with MCNP 4C code. We also compared our results， with the existing measurement， calculation and evaluated data in ENDF/BⅥ.