钚材料的α能谱以及氦气累积的蒙特卡罗计算

Monte-Carlo calculations of α energy spectra and helium accumulation in plutonium material

本文根据钚材料的元素成分和放射性核素的级联衰变规律,编程计算了共涉及11种核素杂质以及氦气的生成。采用蒙特卡罗方法计算,得到了自辐照α粒子能谱及其演化规律。在编制的计算程序中设计了独立的随机数发生器,并利用Fortran95的MODULE功能进行模块化封装。这一以封装模块为主体的程序具有良好的通用性和扩展性,可方便地作为一个功能实现部分嵌入钚材料老化研究的其他程序之中。

According to nuclear decay cascades, a program involving 11 radioactive nuclides and helium accumulation in plutonium material is compiled. The α energy spectra calculated by Monte-Carlo method and evolvement of the decay products are described. In the program, a random number generator is designed by using the MODULE function in Fortran 95. The MODULE function has good feasibility and is easy to be adopted in other program to simulate the aging of plutonium.