基于γ跃迁共振激发的核钟
Nuclear clocks based on resonant excitation of gamma-transitions
摘要：
我们审查的想法和概念的时钟是基于辐射跃迁的原子核，而不是在电子壳层。这种类型的时钟提供的优点，如对场诱导的系统频率偏移的不敏感性，并有机会获得高稳定性，从询问许多核在固态。实验工作主要集中在Th-229的低能（约8 eV）同质异能跃迁。我们回顾了旨在直接光学观察这种转变的实验的现状，并概述了高分辨率激光光谱实验的计划。
英文摘要：
We review the ideas and concepts for a clock that is based on a radiative transition in the nucleus rather than in the electron shell. This type of clock offers advantages like an insensitivity against field-induced systematic frequency shifts and the opportunity to obtain high stability from interrogating many nuclei in the solid state. Experimental work concentrates on the low-energy (about 8 eV) isomeric transition in Th-229. We review the status of the experiments that aim at a direct optical observation of this transition and outline the plans for high-resolution laser spectroscopy experiments.
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