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arXiv 0709.4032physics.atom-ph
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单电离铁的高分辨紫外脉冲laser饱和光谱

High-resolution saturation spectroscopy of singly-ionized iron with a pulsed uv laser

M Ascoli, E E Eyler, D Kawall, David DeMille

摘要:

我们描述了一个单离子化铁(Fe II)的紫外激光光谱的高分辨率方案的设计和实现。缓冲气体冷却的激光烧蚀源用于提供接近室温的具有高密度Fe II的等离子体。我们结合脉冲激光饱和光谱产生亚多普勒分辨率的计划。在一个演示实验中,我们已经检查了Fe II过渡附近260 nm,达到约250 MHz的线宽。该方法适用于测量跃迁频率和超精细结构。它也可以用来测量同位素富集样品中的小同位素位移。

英文摘要:

We describe the design and realization of a scheme for uv laser spectroscopy of singly-ionized iron (Fe II) with very high resolution. A buffer-gas cooled laser ablation source is used to provide a plasma close to room temperature with a high density of Fe II. We combine this with a scheme for pulsed-laser saturation spectroscopy to yield sub-Doppler resolution. In a demonstration experiment, we have examined an Fe II transition near 260 nm, attaining a linewidth of about 250 MHz. The method is well-suited to measuring transition frequencies and hyperfine structure. It could also be used to measure small isotope shifts in isotope-enriched samples.

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