Electromagnetic moments of the odd-mass nickel isotopes $^{59-67}$Ni
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2024
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| author | Müller, P. Kaufmann, S. Miyagi, T. Billowes, J. Bissell, M. L. Blaum, K. Cheal, B. Ruiz, R. F. Garcia Gins, W. Gorges, C. Heylen, H. Kanellakopoulos, A. Malbrunot-Ettenauer, S. Neugart, R. Neyens, G. Nörtershäuser, W. Ratajczyk, T. Rodríguez, L. V. Sánchez, R. Sailer, S. Schwenk, A. Wehner, L. Wraith, C. Xie, L. Xu, Z. Y. Yang, X. F. Yordanov, D. T. |
| author_facet | Müller, P. Kaufmann, S. Miyagi, T. Billowes, J. Bissell, M. L. Blaum, K. Cheal, B. Ruiz, R. F. Garcia Gins, W. Gorges, C. Heylen, H. Kanellakopoulos, A. Malbrunot-Ettenauer, S. Neugart, R. Neyens, G. Nörtershäuser, W. Ratajczyk, T. Rodríguez, L. V. Sánchez, R. Sailer, S. Schwenk, A. Wehner, L. Wraith, C. Xie, L. Xu, Z. Y. Yang, X. F. Yordanov, D. T. |
| contents | The magnetic dipole and the spectroscopic quadrupole moments of the nuclear ground states in the odd-mass nickel isotopes $^{59-67}$Ni have been determined using collinear laser spectroscopy at the CERN-ISOLDE facility. They are compared to ab initio valence-space in-medium similarity renormalization group (VS-IMSRG) calculations including contributions of two-body currents as well as to shell-model calculations. The two-body-current contributions significantly improve the agreement with experimental data, reducing the mean-square deviation from the experimental moments by a factor of 3 to 5, depending on the employed interaction. For all interactions, the largest contributions are obtained for the $5/2^-$ ($7/2^-$) isotopes $^{65}$Ni ($^{55}$Ni), which is ascribed to the high angular momentum of the $f$ orbitals. Our results demonstrate that the inclusion of two-body-current contributions to the magnetic moment in an isotopic chain of complex nuclei can be handled by the VS-IMSRG and can outperform phenomenological shell-model calculations using effective $g$-factors in the nickel region. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_13668 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Electromagnetic moments of the odd-mass nickel isotopes $^{59-67}$Ni Müller, P. Kaufmann, S. Miyagi, T. Billowes, J. Bissell, M. L. Blaum, K. Cheal, B. Ruiz, R. F. Garcia Gins, W. Gorges, C. Heylen, H. Kanellakopoulos, A. Malbrunot-Ettenauer, S. Neugart, R. Neyens, G. Nörtershäuser, W. Ratajczyk, T. Rodríguez, L. V. Sánchez, R. Sailer, S. Schwenk, A. Wehner, L. Wraith, C. Xie, L. Xu, Z. Y. Yang, X. F. Yordanov, D. T. Nuclear Experiment Nuclear Theory The magnetic dipole and the spectroscopic quadrupole moments of the nuclear ground states in the odd-mass nickel isotopes $^{59-67}$Ni have been determined using collinear laser spectroscopy at the CERN-ISOLDE facility. They are compared to ab initio valence-space in-medium similarity renormalization group (VS-IMSRG) calculations including contributions of two-body currents as well as to shell-model calculations. The two-body-current contributions significantly improve the agreement with experimental data, reducing the mean-square deviation from the experimental moments by a factor of 3 to 5, depending on the employed interaction. For all interactions, the largest contributions are obtained for the $5/2^-$ ($7/2^-$) isotopes $^{65}$Ni ($^{55}$Ni), which is ascribed to the high angular momentum of the $f$ orbitals. Our results demonstrate that the inclusion of two-body-current contributions to the magnetic moment in an isotopic chain of complex nuclei can be handled by the VS-IMSRG and can outperform phenomenological shell-model calculations using effective $g$-factors in the nickel region. |
| title | Electromagnetic moments of the odd-mass nickel isotopes $^{59-67}$Ni |
| topic | Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2405.13668 |