【摘要】 用一维离散坐标程序 ANISN计算了多种元素的三群群截面，筛选出可用于组成超热中子束慢化材料的 11种元素；分析了上述 11种元素所构成的单质、化合物和混合物的慢化特性，从中优选出可实现超热中子束的三种慢化材料。更多还原

【Abstract】 The one dimension discrete coordinates transport code ANISN was used to calculate three- group constants of some elements 11 elements which could be used to consist moderating epithermal neutron material of beam.Moderating character of simple substances,compounds and mixtures consisted of the optimized elements analyzed.three kinds of moderating materials were optimized for epithermal neutron beam.更多还原