Isotope-selective trapping of doubly charged Yb ions
Isotope-selective trapping of doubly charged Yb ions
复制标题
双电荷 Yb 离子的同位素选择性捕获
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
J. Torgerson
中科院分区：
文献类型：
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作者：
M. Schauer;J. Danielson;D. Feldbaum;M. Rahaman;Li;J. Zhang;Xinxin Zhao;J. Torgerson
我们报告了同位素选择性加载和捕获双电离镱到射频四极陷阱中。首先通过多级光电离过程将 {sup 174}Yb{sup +} 离子的同位素纯云加载到射频陷阱中。然后通过捕获的 Yb{sup +} 离子的电子碰撞电离产生 Yb{sup 2+} 离子。随后，Yb{sup 2+} 离子通过射频激发其在陷阱中的长期运动而被检测到，这导致激光冷却的 Yb{sup +} 离子的交感加热和荧光变化。通过电子碰撞电离后 Yb{sup +} 离子云中心出现暗带，进一步证实了双电荷 Yb 离子的存在。我们讨论了 Yb{sup 2+}H 和类似化合物的可能形成以及 Yb{sup 2+} 离子的直接光学检测方案。
We report isotope-selective loading and trapping of doubly ionized ytterbium into an rf quadrupole trap. Isotopically pure clouds of {sup 174}Yb{sup +} ions were first loaded into the rf trap via a multistage photoionization process. The Yb{sup 2+} ions were then produced by electron impact ionization of the trapped Yb{sup +} ions. The Yb{sup 2+} ions were subsequently detected by rf excitation of their secular motion in the trap, which led to sympathetic heating and changes in the fluorescence of the laser-cooled Yb{sup +} ions. The presence of doubly charged Yb ions was further verified by the appearance of a dark band in the center of Yb{sup +} ion cloud after electron impact ionization. We discuss the possible formation of Yb{sup 2+}H and similar compounds and the schemes for the direct optical detection of the Yb{sup 2+} ions.