Resonance ionization spectroscopy in dysprosium
Resonance ionization spectroscopy in dysprosium
复制标题
镝的共振电离光谱
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
K. Wendt
中科院分区：
文献类型：
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作者：
D. Studer;P. Dyrauf;P. Naubereit;R. Heinke;K. Wendt
我们报道了镝的高能级共振电离光谱（RIS）。我们制定了有效的激励方案，并通过分析里德堡收敛重新确定了第一电离势（IP）。为此，研究了两步和三步激励梯。在美因茨大学的RISIKO质量分离器中，使用三步共振电离方案，可以证明总电离效率为25(4)%。此外，通过两步激励测量的偶宇称6sns-和6snd- rydberg -级数收敛进行了广泛的分析。为了解释观测到的s序列中的强扰动，应用了多通道量子缺陷理论（MQDT）的方法。考虑到所有单独的系列限制，我们提取的ip值为47901.76(5)cm−1，这与目前的文献值47901.7(6)cm−1一致，但更精确一个数量级。
We report on resonance ionization spectroscopy (RIS) of high-lying energy levels in dysprosium. We developed efficient excitation schemes and re-determined the first ionization potential (IP) via analysis of Rydberg convergences. For this purpose both two- and three-step excitation ladders were investigated. An overall ionization efficiency of 25(4) % could be demonstrated in the RISIKO mass separator of Mainz University, using a three-step resonance ionization scheme. Moreover, an extensive analysis of the even-parity 6sns- and 6snd-Rydberg-series convergences, measured via two-step excitation was performed. To account for strong perturbations in the observed s-series, the approach of multichannel quantum defect theory (MQDT) was applied. Considering all individual series limits we extracted an IP-value of 47901.76(5) cm−1, which agrees with the current literature value of 47901.7(6) cm−1, but is one order of magnitude more precise.