Details

Autor(en) / Beteiligte

• 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.

Titel

Measurement and microscopic description of odd–even staggering of charge radii of exotic copper isotopes

Ist Teil von

• Nature physics, 2020-06, Vol.16 (6), p.620-624

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Springer Nature - Connect here FIRST to enable access

Beschreibungen/Notizen

• Abstract Nuclear charge radii globally scale with atomic mass number A as A 1∕3 , and isotopes with an odd number of neutrons are usually slightly smaller in size than their even-neutron neighbours. This odd–even staggering, ubiquitous throughout the nuclear landscape 1 , varies with the number of protons and neutrons, and poses a substantial challenge for nuclear theory 2–4 . Here, we report measurements of the charge radii of short-lived copper isotopes up to the very exotic 78 Cu (with proton number Z = 29 and neutron number N = 49), produced at only 20 ions s –1 , using the collinear resonance ionization spectroscopy method at the Isotope Mass Separator On-Line Device facility (ISOLDE) at CERN. We observe an unexpected reduction in the odd–even staggering for isotopes approaching the N = 50 shell gap. To describe the data, we applied models based on nuclear density functional theory 5,6 and A -body valence-space in-medium similarity renormalization group theory 7,8 . Through these comparisons, we demonstrate a relation between the global behaviour 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, naturally emerge from A -body calculations fitted to properties of A ≤ 4 nuclei.