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根据高能质子核反应的核内级联模型,采用Monte Carlo方法对高能质子入射靶核的核反应过程进行了模拟计算。碰撞进入靶核内的质子初始位置由随机抽样得到,而初始的能量和动量通过守恒定律计算得出;靶核内的核子数密度采用均匀分布近似;被碰核子的初始动量从Fermi分布中随机抽样得到,被碰核子的初始运动方向从各向同性分布中抽样;核子-核子碰撞动力学采用相对论下的两体碰撞近似。编程计算了高能质子核反应截面、次级粒子能谱等数据,并与相关结果进行了对比分析。
According to the in-core cascade model of high-energy protonuclear reaction, the Monte Carlo method was used to simulate the nuclear reaction process of high-energy protons entering the target nucleus. The initial position of the protons colliding into the target nucleus is obtained by random sampling, and the initial energy and momentum are calculated by the conservation law; the nucleus density in the target nucleus is approximated by uniform distribution; the initial momentum of the nucleon colliding randomly from the Fermi distribution By sampling, the initial direction of the collided nuclei is sampled from the isotropic distribution. The kinetic of the nucleon-nucleon collisions is approximated by the two-body collisions under the theory of relativity. The data of high energy proton nuclear reaction cross section and secondary particle energy spectrum were calculated and compared with the related results.