Fe I OSCILLATOR STRENGTHS FOR TRANSITIONS FROM HIGH-LYING EVEN-PARITY LEVELS
Fe I OSCILLATOR STRENGTHS FOR TRANSITIONS FROM HIGH-LYING EVEN-PARITY LEVELS
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Fe I 振荡器从高偶校验水平过渡的强度
DOI：
10.1088/0067-0049/215/2/23
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Den Hartog E
中科院分区：
文献类型：
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作者：
Den Hartog E
新的辐射寿命，测量到±5%的准确度，报告了31个偶宇称能级的Fe i，范围从45061 cm− 1到56842 cm− 1。这些寿命已被测量使用单步和两步时间分辨的激光诱导荧光的慢原子束的铁原子。已经尝试了所有这些水平的分支分数，并完成了20个水平。这组水平代表了一个扩展的合作工作报告Ruffoni等人。辐射寿命与分支分数相结合，产生新的振子强度为203线的Fe i。利用太阳光球层的1D-LTE模型，对太阳光谱中未混合的这些谱线的子集进行光谱合成，得到平均铁丰度< log [ε（Fe）]>= 7.45±0.06。
New radiative lifetimes, measured to±5% accuracy, are reported for 31 even-parity levels of Fe i ranging from 45061 cm− 1 to 56842 cm− 1. These lifetimes have been measured using single-step and two-step time-resolved laser-induced fluorescence on a slow atomic beam of iron atoms. Branching fractions have been attempted for all of these levels, and completed for 20 levels. This set of levels represents an extension of the collaborative work reported in Ruffoni et al. The radiative lifetimes combined with the branching fractions yields new oscillator strengths for 203 lines of Fe i. Utilizing a 1D-LTE model of the solar photosphere, spectral syntheses for a subset of these lines which are unblended in the solar spectrum yields a mean iron abundance of< log [ε (Fe)]>= 7.45±0.06.