Wang Wu, Zhou Jie, Liu Boqun, Wang Xu
Beijing Computational Science Research Center, Beijing 100193, China.
Graduate School, China Academy of Engineering Physics, Beijing 100193, China.
Phys Rev Lett. 2021 Jul 30;127(5):052501. doi: 10.1103/PhysRevLett.127.052501.
We propose a new approach to excite the isomeric ^{229}Th nuclear state, which has attracted much attention recently as a potential "nuclear clock." Our approach is based on a laser-driven electron recollision process, the core process of strong-field atomic physics. Bringing together knowledge of recollision physics and of the related nuclear physics, we calculate the isomeric excitation probability. This new approach does not require precise knowledge of the energy of the isomeric state. The excitation is well timed which may be exploited to control the coherence of the isomeric state. Experimental realization is within reach using tabletop laser systems.
我们提出了一种激发同质异能素(^{229}Th)核态的新方法，该核态作为一种潜在的“核时钟”最近备受关注。我们的方法基于激光驱动的电子重碰撞过程，这是强场原子物理学的核心过程。结合重碰撞物理学和相关核物理学的知识，我们计算了同质异能素激发概率。这种新方法不需要精确知道同质异能态的能量。激发时间恰到好处，可用于控制同质异能态的相干性。使用桌面激光系统即可实现实验。
