高离化态硫离子光谱的理论分析
Theoretical analysis of spectra of highly ionized sulfur ions
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摘要: 在考虑组态相互作用的基础上，利用包含相对论修正的Hartree-Fock(HFR)理论对S8+-S13+离子的谱线波长及加权振子强度等有关原子参数进行了系统计算，并与最新的实验观测和其它理论计算结果进行了比较。计算结果表明：S8+-S11+的各个原子态在LS耦合下纯度很高，随着离化度的增大，S12+和S13+离子的部分原子态能级出现混合，组态相互作用逐渐增强。通过对实验结果的分析，识别出32条实验谱线，其中大多数谱线来自S8+-S13+离子的2s22pk-2s2pk+1和2s2pk+1-2s2pk+2(k=0,1,2,3,4)之间的跃迁，理论计算结果与实验谱线波长之间的绝对误差大多数都在实验的有效分辨力以内。Abstract: The wavelengths and weighted oscillator strengths for S8+-S13+ ions were systematically studied by using the relativistic Hartree-Fock method with configuration interaction. Comparison of the available experiment and theoretical calculations were carried out. It is found that the purities of S8+-S11+ states are very high in LS coupling scheme. As the ion charge increases, the levels of the S12+-S13+ atomic states begin to mix, and the effect of configuration interaction (CI) becomes important. Thirty-two spectral lines from 16.8 nm to 45.0 nm are identified, most of which arise from the transitions among the levels of the 2s22pk, 2s2pk+1 and 2pk+2(k=0,1,2,3,4) of S8+-S13+ ions by analyzing the results of the experiment. Most of the absolute error between the calculated results and the expe
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Key words:
- sulfur ions /
- spectrum /
- hfr method /
- wavelength /
- energy level /
- weighted oscillator strength
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