Charge radii of neutron-rich scandium isotopes and the seniority symmetry in the $0f_{7/2}$ shell
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| Format: | Preprint |
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2025
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| author | Bai, S. W. Yang, X. F. Koszorús, Á. Berengut, J. C. Billowes, J. Bissell, M. L. Blaum, K. Borschevsky, A. Campbell, P. Cheal, B. Devlin, C. S. Flanagan, K. T. Ruiz, R. F. Garcia Heylen, H. Holt, J. D. Hu, B. S. Kanellakopoulos, A. Krämer, J. Lagaki, V. Maaß, B. Malbrunot-Ettenauer, S. Miyagi, T. König, K. Kortelainen, M. Nazarewicz, W. Neugart, R. Neyens, G. Nörtershäuser, W. Reinhard, P. -G. Reitsma, M. L. Rodríguez, L. V. Sommer, F. Xu, Z. Y. |
| author_facet | Bai, S. W. Yang, X. F. Koszorús, Á. Berengut, J. C. Billowes, J. Bissell, M. L. Blaum, K. Borschevsky, A. Campbell, P. Cheal, B. Devlin, C. S. Flanagan, K. T. Ruiz, R. F. Garcia Heylen, H. Holt, J. D. Hu, B. S. Kanellakopoulos, A. Krämer, J. Lagaki, V. Maaß, B. Malbrunot-Ettenauer, S. Miyagi, T. König, K. Kortelainen, M. Nazarewicz, W. Neugart, R. Neyens, G. Nörtershäuser, W. Reinhard, P. -G. Reitsma, M. L. Rodríguez, L. V. Sommer, F. Xu, Z. Y. |
| contents | Nuclear charge radii of neutron-rich $^{47-49}$Sc isotopes were measured using collinear laser spectroscopy at CERN-ISOLDE. The new data reveal that the charge radii of scandium isotopes exhibit a distinct trend between $N=20$ and $N=28$, with $^{41}$Sc and $^{49}$Sc isotopes having similar values, mirroring the closeness of the charge radii of $^{40}$Ca and $^{48}$Ca. Theoretical models that successfully interpret the radii of calcium isotopes could not account for the observed behavior in scandium radii, in particular the reduced odd-even staggering. Remarkably, the inclusion of the new $^{49}$Sc radius data has unveiled a similar trend in the charge radii of $N=28$ isotones and $Z=20$ isotopes when adding the neutrons atop the $^{40}$Ca core and the protons atop the $^{48}$Ca core, respectively. We demonstrate that this trend is consistent with the prediction of the seniority model. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_12001 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Charge radii of neutron-rich scandium isotopes and the seniority symmetry in the $0f_{7/2}$ shell Bai, S. W. Yang, X. F. Koszorús, Á. Berengut, J. C. Billowes, J. Bissell, M. L. Blaum, K. Borschevsky, A. Campbell, P. Cheal, B. Devlin, C. S. Flanagan, K. T. Ruiz, R. F. Garcia Heylen, H. Holt, J. D. Hu, B. S. Kanellakopoulos, A. Krämer, J. Lagaki, V. Maaß, B. Malbrunot-Ettenauer, S. Miyagi, T. König, K. Kortelainen, M. Nazarewicz, W. Neugart, R. Neyens, G. Nörtershäuser, W. Reinhard, P. -G. Reitsma, M. L. Rodríguez, L. V. Sommer, F. Xu, Z. Y. Nuclear Experiment Nuclear Theory Nuclear charge radii of neutron-rich $^{47-49}$Sc isotopes were measured using collinear laser spectroscopy at CERN-ISOLDE. The new data reveal that the charge radii of scandium isotopes exhibit a distinct trend between $N=20$ and $N=28$, with $^{41}$Sc and $^{49}$Sc isotopes having similar values, mirroring the closeness of the charge radii of $^{40}$Ca and $^{48}$Ca. Theoretical models that successfully interpret the radii of calcium isotopes could not account for the observed behavior in scandium radii, in particular the reduced odd-even staggering. Remarkably, the inclusion of the new $^{49}$Sc radius data has unveiled a similar trend in the charge radii of $N=28$ isotones and $Z=20$ isotopes when adding the neutrons atop the $^{40}$Ca core and the protons atop the $^{48}$Ca core, respectively. We demonstrate that this trend is consistent with the prediction of the seniority model. |
| title | Charge radii of neutron-rich scandium isotopes and the seniority symmetry in the $0f_{7/2}$ shell |
| topic | Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2504.12001 |