论文标题
$^{229} $ th Isomer：核光钟的前景
The $^{229}$Th isomer: prospects for a nuclear optical clock
论文作者
论文摘要
核光钟开发的提议引发了许多实验和理论研究。特别是，预测$ 10^{ - 19} $的前所未有的系统频率不确定性使核时钟成为许多应用程序的有趣工具，即使是重新定义第二个应用程序。相应研究的重点是$^{229} $ th核的核转变，该核的核激发能量仅为$ 8.12 \ pm0.11 $ eV（$ 152.7 \ pm2.1 $ nm）。该能量足够低，可以允许核激光光谱法，这是核钟的固有要求。最近，已经取得了核频率标准的一些重大进展，到目前为止，毫无疑问，核时钟将成为现实，甚至在太远的未来也不会。在这里，我们对核时钟开发的当前状态进行了全面的综述，目的是提供与该主题相关的文献清单相当完整的列表，该清单可以作为未来研究的参考。
The proposal for the development of a nuclear optical clock has triggered a multitude of experimental and theoretical studies. In particular the prediction of an unprecedented systematic frequency uncertainty of about $10^{-19}$ has rendered a nuclear clock an interesting tool for many applications, potentially even for a re-definition of the second. The focus of the corresponding research is a nuclear transition of the $^{229}$Th nucleus, which possesses a uniquely low nuclear excitation energy of only $8.12\pm0.11$ eV ($152.7\pm2.1$ nm). This energy is sufficiently low to allow for nuclear laser spectroscopy, an inherent requirement for a nuclear clock. Recently, some significant progress toward the development of a nuclear frequency standard has been made and by today there is no doubt that a nuclear clock will become reality, most likely not even in the too far future. Here we present a comprehensive review of the current status of nuclear clock development with the objective of providing a rather complete list of literature related to the topic, which could serve as a reference for future investigations.
