关键词: 
电子离子碰撞 /
共振激发双自电离 /
扭曲波玻恩近似

摘要: 利用相对论修正扭曲波玻恩近似 ,计算了类钠离子Ti11+ 和Cr13 + 的电子碰撞直接电离 ,激发自电离和共振激发双自电离截面 .理论数据与实验结果在整个能区内很好符合 .共振激发双自电离截面对总截面的贡献约为 2 0 %— 3 0 % ,对速率系数的影响较大 ,不可忽略.Using semirelativistic distorted-wave Born approximation m et hod, we have calculated direct ionization (DI), excitation autoionization (E A) and resonant excitation double- autoionization (REDA) cross sections of Na- like ions Ti 11+ and Cr 13+ . There is a good agreement between theore tical results and experimental data in magnitude over the entire energy region. REDA processes contribute about 20%-30% to the total ionization cross section a nd cannot be neglected...