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Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes
Isotopes with an odd number of neutrons are usually slightly smaller in size than their even-neutron neighbours. In charge radii of short-lived copper isotopes, a reduction of this effect is observed when the neutron number approaches fifty.
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2019
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1038/s41567-020-0868-y http://cds.cern.ch/record/2705803 |
| _version_ | 1780964834747088896 |
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| author | de Groote, R.P. Billowes, J. Binnersley, C.L. Bissell, M.L. Cocolios, T.E. Day Goodacre, T. Farooq-Smith, G.J. Fedorov, D.V. Flanagan, K.T. Franchoo, S. Garcia Ruiz, R.F. Gins, W. Holt, J.D. Koszorús, Á. Lynch, K.M. Miyagi, T. Nazarewicz, W. Neyens, G. Reinhard, P.-G. Rothe, S. Stroke, H.H. Vernon, A.R. Wendt, K.D.A. Wilkins, S.G. Xu, Z.Y. Yang, X.F. |
| author_facet | de Groote, R.P. Billowes, J. Binnersley, C.L. Bissell, M.L. Cocolios, T.E. Day Goodacre, T. Farooq-Smith, G.J. Fedorov, D.V. Flanagan, K.T. Franchoo, S. Garcia Ruiz, R.F. Gins, W. Holt, J.D. Koszorús, Á. Lynch, K.M. Miyagi, T. Nazarewicz, W. Neyens, G. Reinhard, P.-G. Rothe, S. Stroke, H.H. Vernon, A.R. Wendt, K.D.A. Wilkins, S.G. Xu, Z.Y. Yang, X.F. |
| author_sort | de Groote, R.P. |
| collection | CERN |
| description | Isotopes with an odd number of neutrons are usually slightly smaller in size than their even-neutron neighbours. In charge radii of short-lived copper isotopes, a reduction of this effect is observed when the neutron number approaches fifty. |
| id | cern-2705803 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2019 |
| record_format | invenio |
| spelling | cern-27058032023-03-12T05:10:53Zdoi:10.1038/s41567-020-0868-yhttp://cds.cern.ch/record/2705803engde Groote, R.P.Billowes, J.Binnersley, C.L.Bissell, M.L.Cocolios, T.E.Day Goodacre, T.Farooq-Smith, G.J.Fedorov, D.V.Flanagan, K.T.Franchoo, S.Garcia Ruiz, R.F.Gins, W.Holt, J.D.Koszorús, Á.Lynch, K.M.Miyagi, T.Nazarewicz, W.Neyens, G.Reinhard, P.-G.Rothe, S.Stroke, H.H.Vernon, A.R.Wendt, K.D.A.Wilkins, S.G.Xu, Z.Y.Yang, X.F.Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopesnucl-thNuclear Physics - Theorynucl-exNuclear Physics - ExperimentIsotopes with an odd number of neutrons are usually slightly smaller in size than their even-neutron neighbours. In charge radii of short-lived copper isotopes, a reduction of this effect is observed when the neutron number approaches fifty.The mesoscopic nature of the atomic nucleus gives rise to a wide array of macroscopic and microscopic phenomena. The size of the nucleus is a window into this duality: while the charge radii globally scale as $A^{1/3}$, their evolution across isotopic chains reveals unanticipated structural phenomena [1-3]. The most ubiquitous of these is perhaps the Odd-Even Staggering (OES) [4]: isotopes with an odd number of neutrons are usually smaller in size than the trend of their even-neutron neighbours suggests. This OES effect varies with the number of protons and neutrons and poses a significant challenge for nuclear theory [5-7]. Here, we examine this problem with new measurements of the charge radii of short-lived copper isotopes up to the very exotic $^{78}$Cu $(Z=29, N=49)$, produced at only 20 ions/s, using the highly-sensitive Collinear Resonance Ionisation Spectroscopy (CRIS) method at ISOLDE-CERN. Due to the presence of a single proton outside of the closed Z=28 shell, these measurements provide crucial insights into the single-particle proton structure and how this affects the charge radii. We observe an unexpected reduction in the OES for isotopes approaching the $N=50$ shell gap. To describe the data, we applied models based on nuclear Density Functional Theory [2,8] (DFT) and ab-initio Valence-Space In-Medium Similarity Renormalization Group (VS-IMSRG) theory [9,10]. Through these comparisons, we demonstrate a relation between the global behavior of charge radii and the saturation density of nuclear matter, and show that the local charge radii variations, which reflect the many-body polarization effects due to the odd neutron, naturally emerge from the VS-IMSRG calculations.arXiv:1911.08765oai:cds.cern.ch:27058032019-11-20 |
| spellingShingle | nucl-th Nuclear Physics - Theory nucl-ex Nuclear Physics - Experiment de Groote, R.P. Billowes, J. Binnersley, C.L. Bissell, M.L. Cocolios, T.E. Day Goodacre, T. Farooq-Smith, G.J. Fedorov, D.V. Flanagan, K.T. Franchoo, S. Garcia Ruiz, R.F. Gins, W. Holt, J.D. Koszorús, Á. Lynch, K.M. Miyagi, T. Nazarewicz, W. Neyens, G. Reinhard, P.-G. Rothe, S. Stroke, H.H. Vernon, A.R. Wendt, K.D.A. Wilkins, S.G. Xu, Z.Y. Yang, X.F. Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes |
| title | Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes |
| title_full | Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes |
| title_fullStr | Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes |
| title_full_unstemmed | Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes |
| title_short | Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes |
| title_sort | measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes |
| topic | nucl-th Nuclear Physics - Theory nucl-ex Nuclear Physics - Experiment |
| url | https://dx.doi.org/10.1038/s41567-020-0868-y http://cds.cern.ch/record/2705803 |
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