Precision calculation of hyperfine-structure constants for extracting nuclear quadrupole moment of $^{43}$Ca
Fuente:
arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866912546435366912 |
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| author | Tang, Yong-Bo |
| author_facet | Tang, Yong-Bo |
| contents | There have been several reported values for the nuclear quadrupole moment of $^{43}$Ca, but significant discrepancies exist among these reported values, ranging from \(-0.0408(8)\)~b to \(-0.065(20)\)~b. In this work, we performed an accurate calculation of the electric field gradients of the \(4s4p~^3\!P_{1}\), \(4s4p~^3\!P_{2}\) and \(4s3d~^1\!D_2\) states in the $^{43}$Ca atom using a hybrid method. This hybrid method integrates the advantages of the configuration interaction method and the coupled-cluster method, and can simultaneously account for core-core, core-valence, and valence-valence correlations. By combining our calculated results with the experimental values of the electric quadrupole hyperfine-structure constants of these three states, an accurate and reliable nuclear quadrupole moment of $^{43}$Ca was determined to be \(-0.0479(6)\)~b, which could be recommended as a reference for \(^{43}\text{Ca}\). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_15226 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Precision calculation of hyperfine-structure constants for extracting nuclear quadrupole moment of $^{43}$Ca Tang, Yong-Bo Atomic Physics There have been several reported values for the nuclear quadrupole moment of $^{43}$Ca, but significant discrepancies exist among these reported values, ranging from \(-0.0408(8)\)~b to \(-0.065(20)\)~b. In this work, we performed an accurate calculation of the electric field gradients of the \(4s4p~^3\!P_{1}\), \(4s4p~^3\!P_{2}\) and \(4s3d~^1\!D_2\) states in the $^{43}$Ca atom using a hybrid method. This hybrid method integrates the advantages of the configuration interaction method and the coupled-cluster method, and can simultaneously account for core-core, core-valence, and valence-valence correlations. By combining our calculated results with the experimental values of the electric quadrupole hyperfine-structure constants of these three states, an accurate and reliable nuclear quadrupole moment of $^{43}$Ca was determined to be \(-0.0479(6)\)~b, which could be recommended as a reference for \(^{43}\text{Ca}\). |
| title | Precision calculation of hyperfine-structure constants for extracting nuclear quadrupole moment of $^{43}$Ca |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2508.15226 |