Radium ionization scheme development: The first observed autoionizing states and optical pumping effects in the hot cavity environment
Radium ionization scheme development: The first observed autoionizing states and optical pumping effects in the hot cavity environment
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DOI：
10.1016/j.sab.2018.10.002
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发表时间：
2018-12-01
影响因子：
3.3
通讯作者：
Yang, X. F.
中科院分区：
文献类型：
--
作者：
Goodacre, T. Day;Billowes, J.;Yang, X. F.
本文报道了用CERN-ISOLDE放射性离子束装置的共振电离激光离子源（RILLS）产生奇异镭离子束的共振电离方案的发展。在研究过程中，首次观察到了镭原子的自电离态。三个电离方案被确定，起源于7s（2）S-1（0）原子基态。最佳的电离方案涉及五个原子跃迁，其中四个是由三个共振调谐激光引起的。这是第一个采用光抽运效应的热腔RILLS电离方案。详细的光谱研究的描述和新的电离方案进行了总结。
This paper reports on resonance ionization scheme development for the production of exotic radium ion beams with the Resonance Ionization Laser Ion Source (RILLS) of the CERN-ISOLDE radioactive ion beam facility. During the study, autoionizing states of atomic radium were observed for the first time. Three ionization schemes were identified, originating from the 7s(2) S-1(0) atomic ground state. The optimal of the identified ionization schemes involves five atomic transitions, four of which are induced by three resonantly tuned lasers. This is the first hot cavity RILLS ionization scheme to employ optical pumping effects. The details of the spectroscopic studies are described and the new ionization schemes are summarized.