Development of Ultracold Francium Atomic Sources Towards the Permanent EDM Search.
Development of Ultracold Francium Atomic Sources Towards the Permanent EDM Search.
复制标题
开发超冷钫原子源以实现永久 EDM 搜索。
DOI：
10.1007/s00601-021-01710-4
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
Hayamizu;T.;et al.
第七周期的碱原子钫（Fr）可以用激光冷却和俘获技术获得超冷原子，并可用于寻找电子的永久电偶极矩（EDM）的实验。为了提高电子EDM搜索的灵敏度，开发高强度的Fr原子源是必不可少的。我们演示了在RIKEN用加速do束轰击固定金目标的聚变反应产生高强度fr离子束的速率为10 /s。在静电场聚焦下，以离子束的形式从金靶表面提取金靶内的Fr产物。我们还讨论了通过ac衰变产生efr的方法。中子丰富的fr同位素可以作为这种衰变的子核得到。
Francium (Fr), which is the alkali atom in the 7th period, can be obtained as ultracold atoms with laser cooling and trapping techniques, and could be employed for the experiments on searches for the permanent electric dipole moment (EDM) of an electron. In order to improve the sensitivity of the electron EDM search, development of a high-intensity source of Fr atoms is essential. We demonstrated a production of a high intensityFr ion beam with a rate ofions/s by a fusion reaction with bombardment of an acceleratedO beam onto a fixed gold target in RIKEN. The Fr products inside the gold target were extracted from the gold surface as an ion beam focused with an electrostatic field. We also discussed the method to produceFr by-decay ofAc. A neutron-richFr isotope can be obtained as a daughter nucleus of this decay.