中文摘要：

采用组合激光脉冲（800nm／9．4fs＋24nm／1fs）辐照联合两原子体系产生高次谐波，获得了单一的X-射线阿秒脉冲．我们发现，当固定钛宝石激光的峰值强度并改变高频谐波脉冲的峰值强度Ik时，存在一个优选的Ih范围，在该范围内相应的阿秒脉冲最优化，即强度达到最强，对此，本文从受激复合的角度给出了合理解释．

英文摘要：

In this paper the single X-ray attosecond pulse generation is obtained from two-atom system exposed to the combined laser pulse （800 nm/9.4 fs ＋ 24 nm/1 fs）. Furthermore, when we change the peak intensity Ih of the high-frequency pulse and keep the intensity of the Ti： sapphire pulse unchanged, we find that there is a range of Ih where the intensity of the asec pulse is the most intense,and we present reasonable explanations from the stimulated property of the recombination.