# A proton density bubble in the doubly magic $^{34}$Si nucleus

* Auteur correspondant
Abstract : Many properties of the atomic nucleus, such as vibrations, rotations and incompressibility, can be interpreted as due to a two component quantum liquid of protons and neutrons. Electron scattering measurements on stable nuclei demonstrate that their central densities are saturated, as for liquid drops. In exotic nuclei near the limits of mass and charge, with large imbalances in their proton and neutron numbers, the possibility of a depleted central density, or a ‘bubble’ structure, has been discussed in a recurrent manner since the 1970s. Here we report first experimental evidence that points to a depletion of the central density of protons in the short-lived nucleus 34Si. The proton-to-neutron density asymmetry in 34Si offers the possibility to place constraints on the density and isospin dependence of the spin–orbit force—on which nuclear models have disagreed for decades—and on its stabilizing effect towards limits of nuclear existence.
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Article dans une revue
Nature Physics, Nature Publishing Group, 2017, 13 (2), pp.142-146. 〈10.1038/NPHYS3916〉

http://hal.in2p3.fr/in2p3-01387617
Contributeur : Michel Lion <>
Soumis le : mardi 11 juillet 2017 - 16:21:36
Dernière modification le : jeudi 26 juillet 2018 - 12:09:28
Document(s) archivé(s) le : mercredi 24 janvier 2018 - 20:35:07

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### Citation

A. Mutschler, A. Lemasson, O. Sorlin, D. Bazin, C. Borcea, et al.. A proton density bubble in the doubly magic $^{34}$Si nucleus. Nature Physics, Nature Publishing Group, 2017, 13 (2), pp.142-146. 〈10.1038/NPHYS3916〉. 〈in2p3-01387617〉

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