类Ne Fe XVII离子中LMM双电子伴线的实验室综合测量
Comprehensive Laboratory Measurements Resolving the LMM Dielectronic Recombination Satellite Lines in Ne-like Fe XVII Ions
摘要：
我们研究了实验和理论上的双电子复合（DR）填充双激发配置$3l3l'$（LMM）在Fe XVII，软X射线线形成在这个无处不在的物种的最强通道。我们使用了两种不同的电子束离子阱和两种互补的测量方案来制备Fe XVII样品并评估其纯度，观察到可忽略的污染影响。这使我们能够诊断两个EBIT中的电子密度。我们比较了我们的实验共振能量和强度与以前的独立工作在储存环，以及配置相互作用，多配置Dirac-Fock计算，和多体微扰理论。最后一种方法在与组合的独立实验结果的比较中显示出突出的预测能力。从这些数据中，我们还推断出DR率系数，揭示了与OPEN-ADAS和AtomDB数据库中汇编的数据的差异。
英文摘要：
We investigated experimentally and theoretically dielectronic recombination (DR) populating doubly excited configurations $3l3l'$ (LMM) in Fe XVII, the strongest channel for soft X-ray line formation in this ubiquitous species. We used two different electron beam ion traps and two complementary measurement schemes for preparing the Fe XVII samples and evaluating their purity, observing negligible contamination effects. This allowed us to diagnose the electron density in both EBITs. We compared our experimental resonant energies and strengths with those of previous independent work at a storage ring as well as those of configuration interaction, multiconfiguration Dirac-Fock calculations, and many-body perturbation theory. This last approach showed outstanding predictive power in the comparison with the combined independent experimental results. From these we also inferred DR rate coefficients, unveiling discrepancies from those compiled in the OPEN-ADAS and AtomDB databases.
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