Evidence of a sudden increase in the nuclear size of proton-rich silver-96
Reponen, M., de Groote, R. P., Al Ayoubi, L., Beliuskina, O., Bissell, M. L., Campbell, P., Cañete, L., Cheal, B., Chrysalidis, K., Delafosse, C., de Roubin, A., Devlin, C. S., Eronen, T., Garcia Ruiz, R. F., Geldhof, S., Gins, W., Hukkanen, M., Imgram, P., Kankainen, A., . . . Moore, I. D. (2021). Evidence of a sudden increase in the nuclear size of proton-rich silver-96. Nature Communications, 12, Article 4596. https://doi.org/10.1038/s41467-021-24888-x
Published inNature Communications
Gins, W. |
© 2021 the Authors
Understanding the evolution of the nuclear charge radius is one of the long-standing challenges for nuclear theory. Recently, density functional theory calculations utilizing Fayans functionals have successfully reproduced the charge radii of a variety of exotic isotopes. However, difficulties in the isotope production have hindered testing these models in the immediate region of the nuclear chart below the heaviest self-conjugate doubly-magic nucleus 100Sn, where the near-equal number of protons (Z) and neutrons (N) lead to enhanced neutron-proton pairing. Here, we present an optical excursion into this region by crossing the N = 50 magic neutron number in the silver isotopic chain with the measurement of the charge radius of 96Ag (N = 49). The results provide a challenge for nuclear theory: calculations are unable to reproduce the pronounced discontinuity in the charge radii as one moves below N = 50. The technical advancements in this work open the N = Z region below 100Sn for further optical studies, which will lead to more comprehensive input for nuclear theory development. ...
PublisherSpringer Science and Business Media LLC
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Related funder(s)European Commission; Academy of Finland
Funding program(s)Academy Research Fellow, AoF; Postdoctoral Researcher, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingThe Academy of Finland funded this work through M.R.’s Postdoctoral Researcher project 296323. R.P.D.G. received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No 844829. A.K.’s European Union’s Horizon 2020 research and innovation program grant agreement No. 771036 (ERC CoG MAIDEN), T.E.’s Academy of Finland Research Fellow project number 295207, and UK Science and Technology Facilities Council (STFC) grant ST/P004598/1 provided additional funding. P.I. acknowledges funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—Project-ID 279384907—SFB 1245. ...
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