E_p≤300MeV质子-铅核核反应微观截面的理论计算

THEORETICAL CALCULATIONS FOR PROTON PB NUCLEUS REACTION CROSS SECTIONS WITH E_p≤300 MeV

对５—３００ ＭｅＶ 能区质子与天然铅的各种反应截面进行了计算，在符合多种实验数据的基础上，预言了长寿命放射性核的累积产生截面及其随质子入射能量的变化和中子多重数。在分析实验数据的基础上，给出了中能质子引发天然铅核裂变质量分布的经验公式，计算了电荷分布，并将计算结果与实验数据进行了比较。

Various cross sections of p+ Nat Pb reaction are calculated in the energy region 5~300 MeV based on nuclear reaction models-optical model,evaporation model,exciton model,and direct reaction theory.Experiment data show that the calculations are quite reasonable.Excitation functions of some long lived radioactive nuclei and neutron multiplicity are predicted.For medium energy proton induced Nat Pb fission,an empirical formula is developed to calculate mass and charge distribution based on the experiment data.