利用高分辨率傅里叶变换光谱测量的 Ni II 从 $3d^84d$ 到 $3d^84p$ 能级跃迁的实验振子强度
Experimental Ni II Oscillator Strengths for Transitions from $3d^84d$ to $3d^84p$ Levels Measured Using High-resolution Fourier Transform Spectroscopy
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中文总结 AI 辅助
本文首次实验测量了 Ni II 3d$^8$4d-3d$^8$4p 跃迁的振子强度，利用傅里叶变换光谱和分支比结合寿命数据，为174条谱线提供了绝对振子强度，显著改进了理论计算。
中文摘要 AI 辅助
我们首次展示了 Ni II 3d$^8$4d - 3d$^8$4p 跃迁的实验测量振子强度。记录了 Ni-He 空心阴极灯的高分辨率傅里叶变换光谱，并使用氘标准灯进行强度校准，以确定 200 至 395 nm 范围内 Ni II 发射线的相对强度。总共确定了来自 35 个 3d$^8$4d 上能级的观测谱线的分支比，其中 31 个能级的分支比至少占预测跃迁概率的 95%，其完整性足以给出可靠的分支比。将我们测量的分支比与四个实验和 27 个理论计算的能级寿命相结合，为 174 条谱线提供了绝对振子强度，这些谱线此前没有实验值。我们将结果与三组先前发表的理论计算进行比较，展示了实验室测量对这些原子数据的改进。请注意：跃迁概率数据集已从本预印本中扣留，以确保仅发布经同行评审的最终版本。这种方法可防止在广泛使用的原子数据库和建模框架中传播重复或不一致的数据。
英文摘要
We present the first experimentally measured oscillator strengths for Ni II 3d$^8$4d - 3d$^8$4p transitions. High-resolution Fourier transform spectra were recorded of Ni-He hollow cathode lamps, and intensity calibrated using deuterium standard lamps to determine relative intensities of Ni II emission lines between 200 and 395 nm. Branching fractions were determined for observed lines from 35 3d$^8$4d upper levels in total, and account for at least 95% of the predicted transition probability for 31 of these levels, with sufficient completeness to give reliable branching fractions. Combining our measured branching fractions with four experimental and 27 theoretically calculated energy level lifetimes provided absolute oscillator strengths for 174 lines, for which no previous experimental values exist. We compare the results with three sets of previously published theoretical calculations, illustrating the improvement of laboratory measurements for these atomic data. Please note: The transition probability datasets are withheld from this pre-print to ensure that only the peer-reviewed, definitive versions are released. This approach prevents the propagation of duplicate or inconsistent data across widely used atomic databases and modelling frameworks.
发表机构
- Imperial College London（帝国理工学院）
- National Institute of Standards and Technology（美国国家标准与技术研究院）
- NASA Goddard Space Flight Center（NASA戈达德太空飞行中心）
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