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arXiv 1502.01096physics.atom-ph
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用于原子钟的高电荷态离子和精细结构常数变化的研究

Highly charged ions for atomic clocks and search for variation of the fine structure constant

V. A. Dzuba, V. V. Flambaum

摘要:

我们回顾了一些具有光学跃迁的高电荷态离子,这些离子适合于建立极其精确的原子钟。这包括从Hf $^{12+}$到U $^{34+}$的离子,它们具有价电子的$4f^{12}$配置,Ir $^{17+}$离子,它在几乎填满的$4f$子壳层中有一个洞,Ho $^{14+}$、Cf $^{15+}$、Es $^{17+}$和Es $^{16+}$离子。这些离子中的大多数的时钟跃迁对精细结构常数$α$($α= e^2/\hbar c$)的变化敏感。例如,在一个示例中,钙离子和离子对$α$ -变化具有最大的已知灵敏度,而钬离子看起来是最适合用于实验研究的离子。我们研究了离子的光谱及其作为频率标准使用的相关功能。

英文摘要:

We review a number of highly charged ions which have optical transitions suitable for building extremely accurate atomic clocks. This includes ions from Hf$^{12+}$ to U$^{34+}$, which have the $4f^{12}$ configuration of valence electrons, the Ir$^{17+}$ ion, which has a hole in almost filled $4f$ subshell, the Ho$^{14+}$, Cf$^{15+}$, Es$^{17+}$ and Es$^{16+}$ ions. Clock transitions in most of these ions are sensitive to variation of the fine structure constant, $α$ ($α= e^2/\hbar c$). E.g., californium and einsteinium ions have largest known sensitivity to $α$-variation while holmium ion looks as the most suitable ion for experimental study. We study the spectra of the ions and their features relevant to the use as frequency standards.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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