Theoretical calculations of isotope shifts in highly charged Ni$^{12+}$ ion
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908739994386432 |
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| author | Yu, Shi-cheng Guan, Hua She, Lei Li, Cheng-Bin |
| author_facet | Yu, Shi-cheng Guan, Hua She, Lei Li, Cheng-Bin |
| contents | We present relativistic many-body perturbation theory plus configuration interaction (MBPT+CI) calculations of the lowest four excited states of Ni$^{12+}$, a promising candidate for highly charged ion (HCI) optical clocks. By combining the convergence behavior from multiple calculation models, we perform a detailed analysis of the electron-correlation effects and both the excitation energies and their uncertainties are obtained. Our computed energies for the first two excited states deviate from experimental values by less than $10~\mathrm{cm^{-1}}$, with relative uncertainties estimated below $0.2\%$. Building on the same computational procedure, we calculate the mass shift and field shift constants for the lowest four excited states of Ni$^{12+}$, and the resulting isotope shifts exhibit valence-correlation-induced relative uncertainties below the $1\%$ level. These results provide essential atomic-structure input for high-precision isotope shift spectroscopy in Ni$^{12+}$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_22850 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Theoretical calculations of isotope shifts in highly charged Ni$^{12+}$ ion Yu, Shi-cheng Guan, Hua She, Lei Li, Cheng-Bin Atomic Physics We present relativistic many-body perturbation theory plus configuration interaction (MBPT+CI) calculations of the lowest four excited states of Ni$^{12+}$, a promising candidate for highly charged ion (HCI) optical clocks. By combining the convergence behavior from multiple calculation models, we perform a detailed analysis of the electron-correlation effects and both the excitation energies and their uncertainties are obtained. Our computed energies for the first two excited states deviate from experimental values by less than $10~\mathrm{cm^{-1}}$, with relative uncertainties estimated below $0.2\%$. Building on the same computational procedure, we calculate the mass shift and field shift constants for the lowest four excited states of Ni$^{12+}$, and the resulting isotope shifts exhibit valence-correlation-induced relative uncertainties below the $1\%$ level. These results provide essential atomic-structure input for high-precision isotope shift spectroscopy in Ni$^{12+}$. |
| title | Theoretical calculations of isotope shifts in highly charged Ni$^{12+}$ ion |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2512.22850 |