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中文摘要：
利用多组态Dixac-Foek方法计算了类氯镁离子的双电子复合截面．分析了类氨镁离子的高n双电子伴线结构及其对类氯镁离子Ka共振线的影响．结果表明类氨镁离子的高n双电子伴线几乎都分布于Ka共振线的长波一侧．随着n的增加，DS强度呈现明显减小的趋势．虽然来自KLM（n=3）的发射线最强．但n〉3的部分依然给出了非常重要的贡献．即便是来自n〉10的共振的贡献也是不可忽略的．并且高n双电子伴线随着n的增加不断接近Ka共振线，导致和Ka共振线的强烈混合．在实验测量中会使Ka共振线峰位的测量值向长波方向移动，使谱形加宽，并且增强了Ka共振线测量值强度．
英文摘要：
Based on the multi-confignration Dirac-Fock method, theoretical calculations have been made for the dielectronic recombination cross-sections and the high-n dielectronic satellites to Ka resonance line in helium-like magnesium ions. It is found that high-n dielectronic satellites are always locating on the red wings, and approaching to the resonance line gradually and become weaker with increase of n value. In this consequence, the accumulation of high-n dielectronic satellites can be very important resulting in a serious mixing with resonance line. These satellites give a significant increase in both the apparent width and the apparent intensity of the resonance line and also induce a positional shift of Ka resonance line.
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