Energy Levels and Transition Rates of Laser-Cooling Candidate Th^-
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Acceso en línea: | |
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| _version_ | 1866915199169069056 |
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| author | Zhang, Rui Lu, Yuzhu Yan, Shuaiting Ning, Chuangang |
| author_facet | Zhang, Rui Lu, Yuzhu Yan, Shuaiting Ning, Chuangang |
| contents | The energy levels and transition rates of promising laser-cooling candidate thorium anion Th^- have been experimentally obtained in the current work. Three new excited states between the bound-bound electric dipole (E1) transition of Th^- are observed now, and their energy levels are determined to be 1,847(13), 3,166.8(59) and 3,666(12) cm^{-1}, respectively. Meanwhile, the lifetime of the upper state of that E1 transition is experimentally determined to be 30(2) microseconds, about 3 times shorter than the previous calculated result 86 microseconds, which makes Th^- the most promising candidate for laser cooling of negative ions. Furthermore, the lifetimes of two other short-lived odd-parity excited states of Th^- are also measured to be 59(4) and 53(3)microseconds, respectively. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_18430 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Energy Levels and Transition Rates of Laser-Cooling Candidate Th^- Zhang, Rui Lu, Yuzhu Yan, Shuaiting Ning, Chuangang Atomic Physics Atomic and Molecular Clusters The energy levels and transition rates of promising laser-cooling candidate thorium anion Th^- have been experimentally obtained in the current work. Three new excited states between the bound-bound electric dipole (E1) transition of Th^- are observed now, and their energy levels are determined to be 1,847(13), 3,166.8(59) and 3,666(12) cm^{-1}, respectively. Meanwhile, the lifetime of the upper state of that E1 transition is experimentally determined to be 30(2) microseconds, about 3 times shorter than the previous calculated result 86 microseconds, which makes Th^- the most promising candidate for laser cooling of negative ions. Furthermore, the lifetimes of two other short-lived odd-parity excited states of Th^- are also measured to be 59(4) and 53(3)microseconds, respectively. |
| title | Energy Levels and Transition Rates of Laser-Cooling Candidate Th^- |
| topic | Atomic Physics Atomic and Molecular Clusters |
| url | https://arxiv.org/abs/2409.18430 |