Radiative transition rates for the forbidden lines in Fe II

Radiative transition rates for the forbidden lines in Fe II
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Fe II 禁线的辐射跃迁率

DOI:
10.1051/0004-6361/201118059
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发表时间:
2011
影响因子:
6.5
通讯作者:
Deb N
Deb N
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Deb N

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在大尺度组态相互作用(CI)计算中,我们报道了Fe Ⅱ 3d 64 s,3d 7和3d 54 s2组态能级间的电四极和磁偶极跃迁.用于基于3d函数的可选选择来优化两组不同的轨道,用于创建和对角化哈密顿矩阵,以及最后用于计算跃迁概率。结果在可能的情况下,我们使用实验能量,不仅用于跃迁能量,而且用于提高我们的从头算CI展开的准确性。我们将我们的结果与其他作者的结果进行比较,并讨论它们之间的差异。对于相同的跃迁但使用不同的d函数获得的结果之间的良好一致性表明我们已经足够好地处理了d函数的状态依赖性。结论我们对自己和其他人的结果的分析表明,我们的许多跃迁率比我们在文中所述的相当保守的20 - 30%更准确,尽管在一小部分跃迁中,我们不能证明比这更高的准确性。
AimsWe report electric quadrupole and magnetic dipole transitions among the levels belonging to 3d64s, 3d7and 3d54s2configurations of Fe II in a large scale configuration interaction (CI) calculation.MethodsThe CIV3 code developed by Hibbert and coworkers is used to determine configuration interaction wave functions for these levels: for the optimisation of two different sets of orbitals based on alternative choices of the 3d function, for creating and diagonalising the Hamiltonian matrices and finally for calculating transition probabilities.ResultsWhere possible, we have used experimental energies, not only for transition energies but also to enhance the accuracy of our ab initio CI expansions. We compare our results with those of other authors, and discuss differences between them. The good agreement between our results obtained for the same transitions but with different d-functions indicates that we have treated the state dependence of the d-functions sufficiently well. Most of our results are available in electronic form as an appendix to the paper.ConclusionsOur analysis of our own results and those of others suggests that many of our transition rates are more accurate than the rather conservative 20−30% we have stated in the text, though in a small proportion of transitions, we could not justify an accuracy greater than this.
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