Optical Mass Spectrometry of Cold RaOH+ and RaOCH3+
Optical Mass Spectrometry of Cold RaOH+ and RaOCH3+
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DOI：
10.1103/physrevlett.126.023002
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发表时间：
2021-01-11
影响因子：
8.6
通讯作者：
Jayich, A. M.
中科院分区：
文献类型：
--
作者：
Fan, M.;Holliman, C. A.;Jayich, A. M.
我们提出了一种全光学质谱技术来识别捕获离子。新方法使用激光冷却离子，在几秒钟内以亚道尔顿分辨率确定被捕获暗离子的质量。我们应用该方法首次鉴定了冷阱RaOH+和RaOCH3+的受控合成。这些分子因其对时间和宇称违反的敏感性而备受期待，这可能会限制标准模型之外的新物理来源。质谱技术的非破坏性可能有助于在光谱学之前识别分子离子或高电荷离子。不同于以往依赖于扫描的小离子晶体质谱技术，该方法使用了固有宽带和相对较快的傅立叶变换。该技术的速度为离子阱中状态分解化学反应的研究提供了新的机会。
We present an all-optical mass spectrometry technique to identify trapped ions. The new method uses laser-cooled ions to determine the mass of a cotrapped dark ion with a sub-dalton resolution within a few seconds. We apply the method to identify the first controlled synthesis of cold, trapped RaOH+ and RaOCH3+. These molecules are promising for their sensitivity to time and parity violations that could constrain sources of new physics beyond the standard model. The nondestructive nature of the mass spectrometry technique may help identify molecular ions or highly charged ions prior to optical spectroscopy. Unlike previous mass spectrometry techniques for small ion crystals that rely on scanning, the method uses a Fourier transform that is inherently broadband and comparatively fast. The technique's speed provides new opportunities for studying state-resolved chemical reactions in ion traps.