利用光学模型、激子模型、蒸发模型及扭曲波玻恩近似理论,对入射能量从阈能到300 MeV,质子入射309Bi的中子反应截面、剩余核产生截面、出射粒子的多重数等进行了理论计算和分析,并将计算结果与实验数据进行了比较。同时得到一组能量到300MeV与实验数据符合很好的光学势参数。 Using the optical model, the exciton model, the evaporation model and the distorted wave Born approximation theory, the incident energy from the threshold energy to 300 MeV, proton incident 309Bi neutron reaction cross section, the remaining nuclear cross section, the number of exiting particles were Theoretical calculation and analysis, and the calculated results and experimental data were compared. At the same time, a set of energies up to 300 MeV is obtained which is in good agreement with the experimental data.