关键词: 屏蔽材料, 镍基合金, 组分配比, 蒙特卡罗

Abstract: Based on Monte Carlo particle transport program, a research method and calculation process for the composition optimization of a new shielding material were established. By analyzing the material properties of different matrices and doping elements, the basic components of the composites were preliminarily screened. The one-tenth layer thickness of different Gd-containing composite material at typical neutron and photon energies was simulated and calculated, and the shielding effect was compared with that of high boron stainless steel. The results show that the Gd-containing nickel-based material exhibits excellent shielding performance at various neutron and photon energies. For nickel-based alloy materials, the influence of Gd content on the neutron shielding performance was calculated and analyzed. It was found that with the increase of Gd content, the neutron shielding performance of the material first improved and then decreased, and the neutron shielding effect was always better than that of nickel-based materials without Gd, while there was a optimum doping amount.

Key words: shielding materials, Ni-based alloy, composition optimization, Monte Carlo