论文标题
（3+1）多光子离子化产生的状态选择的H $ \ _ 2^+$离子的捕获，冷却和光电分离分析分析
Trapping, cooling, and photodissociation analysis of state-selected H$\_2^+$ ions produced by (3+1) multiphoton ionization
论文作者
论文摘要
我们报告了线性RF陷阱中冷的，状态选择的H $ _2^+分子离子的生产。离子由H $ _2 $的（3+1）共振增强的多光子电离（REMPI）产生，并通过激光冷却为$^+$ ions同情冷却。在演示和表征REMPI过程之后，我们在213〜nm处使用深紫外线激光进行光解离，以验证生成的H $ _2^+$ ion样品的高振动纯度。此外，在$ v = 0 $和$ v = 1 $ latver中创建的离子的光解离效率之间的巨大差异提供了一种检测$ v = 0 \至1 $转换的方法。这些结果为基本计量应用的H $ _2^+$的高分辨率振动光谱铺平了道路。
We report on the production of cold, state-selected H$_2^+$ molecular ions in a linear RF trap. The ions are produced by (3+1) resonance-enhanced multi-photon ionisation (REMPI) of H$_2$, and sympathetically cooled by laser-cooled Be$^+$ ions. After demonstrating and characterizing the REMPI process, we use photodissociation by a deep UV laser at 213~nm to verify the high vibrational purity of the produced H$_2^+$ ion samples. Moreover, the large difference between the photodissociation efficiencies of ions created in the $v=0$ and $v=1$ levels provides a way to detect a $v=0 \to 1$ transition. These results pave the way towards high-resolution vibrational spectroscopy of H$_2^+$ for fundamental metrology applications.
