Cm$^{15+}$ and Bk$^{16+}$ ion clocks with enhanced sensitivity to new physics
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866913237391376384 |
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| author | Dzuba, V. A. Flambaum, V. V. |
| author_facet | Dzuba, V. A. Flambaum, V. V. |
| contents | We perform calculations of electronic structure of Cm$^{15+}$ and Bk$^{16+}$ ions and demonstrate that they have transitions which combine the features of atomic optical clocks with the enhanced sensitivity to the variations of the fine structure constant $α$. The high sensitivity is due to large nuclear charge $Z$, high ionisation degree $Z_i$ and the effect of {\em level crossing}, which enables optical transitions between states of different configurations. These are the $6p_{1/2}-5f_{5/2} $ and $6p_{1/2}-5f_{7/2} $ transitions in the single valence electron approximation. Variation of $α$ may be due to the interaction with scalar and pseudoscalar (axion) dark matter fields. Therefore, Cm$^{15+}$ and Bk$^{16+}$ clocks are promising candidates to search for these fields. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_18264 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Cm$^{15+}$ and Bk$^{16+}$ ion clocks with enhanced sensitivity to new physics Dzuba, V. A. Flambaum, V. V. Atomic Physics We perform calculations of electronic structure of Cm$^{15+}$ and Bk$^{16+}$ ions and demonstrate that they have transitions which combine the features of atomic optical clocks with the enhanced sensitivity to the variations of the fine structure constant $α$. The high sensitivity is due to large nuclear charge $Z$, high ionisation degree $Z_i$ and the effect of {\em level crossing}, which enables optical transitions between states of different configurations. These are the $6p_{1/2}-5f_{5/2} $ and $6p_{1/2}-5f_{7/2} $ transitions in the single valence electron approximation. Variation of $α$ may be due to the interaction with scalar and pseudoscalar (axion) dark matter fields. Therefore, Cm$^{15+}$ and Bk$^{16+}$ clocks are promising candidates to search for these fields. |
| title | Cm$^{15+}$ and Bk$^{16+}$ ion clocks with enhanced sensitivity to new physics |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2311.18264 |