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利用全相对论组态相互作用方法,详细研究了W44+离子从基组态3s23p63d104s2俘获一个电子形成双激发态(3s23p63d104s2)?1nln′l′(n=4~6,n′=4~7)的双电子复合(DR)过程。通过比较不同壳层电子激发的DR速率系数,得知4s电子激发和3d电子激发的DR速率系数分别在低温和中高温度时给出了主要贡献,得到了主要的电子激发DR通道。在1 eV~50 keV温度范围内,计算了n=4~18的DR速率系数,并外推到了n=100,得到总DR速率系数。比较总DR速率系数、三体复合(TBR)以及辐射复合(RR)速率系数,结果表明DR速率系数在研究的温度范围内远大于TBR和RR速率系数,其将明显地影响ITER等离子体的电离平衡和离化态布居。

10.11804/NuclPhysRev.30.02.214

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