摘要
利用多组态Dirac-Fock方法计算了类氦镁离子的双电子复合截面.分析了类氦镁离子的高n双电子伴线结构及其对类氦镁离子Kα共振线的影响.结果表明类氦镁离子的高n双电子伴线几乎都分布于Kα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Kα共振线,导致和Kα共振线的强烈混合.在实验测量中会使Kα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Kα共振线测量值强度.
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.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2006年第4期782-786,共5页
Journal of Atomic and Molecular Physics
基金
国家自然科学基金(10376026
10434100)
教育部优秀青年教师资助计划项目
兰州重离子加速器国家实验室原子核理论中心基金
西北师范大学科技创新工程项目(NWNU-KJCXGC-214)