Scaling limit analysis of Borromean halos
Abstract
The analysis of the core recoil momentum distribution of neutron-rich isotopes of light exotic nuclei is performed within a model of the halo nuclei described by a core and two neutrons dominated by the s-wave channel. We adopt the renormalized three-body model with a zero-range force, that accounts for the universal Efimov physics. This model is applicable to nuclei with large two-neutron halos compared to the core size, and a neutron-core scattering length larger than the interaction range. The halo wave function in momentum space is obtained by using as inputs the two-neutron separation energy and the energies of the singlet neutron-neutron and neutron-core virtual states. Within our model, we obtain the momentum probability densities for the Borromean exotic nuclei Lithium-11 (11Li), Berylium-14 (14Be) and Carbon-22 (22C). A fair reproduction of the experimental data was obtained in the case of the core recoil momentum distribution of 11Li and 14Be, without free parameters. By extending the model to 22C, the combined analysis of the core momentum distribution and matter radius suggest (i) a 21C virtual state well below 1 MeV; (ii) an overestimation of the extracted matter 22C radius; and (iii) a two-neutron separation energy between 100 and 400 keV.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.