Scaling of the 19B two-neutron halo properties close to unitarity

Autor(es)

Hiyama, Emiko ; Lazauskas, Rimantas ; Carbonell, Jaume ; Frederico, Tobias

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW C; v. 106, n. 6, p. 8-pg., 2022-12-01.

Resumo

We explore the description of the bound 19B isotope in terms of a 17B +n + n three-body system where the two-body subsystems 17B +n and neutron-neutron (nn) have virtual states close to the continuum. Dimensionless scaling functions for the root-mean-square (rms) radii are defined and studied for different parameters of the neutron-core potential and considering three different models for neutron-neutron interaction. The scaling functions for the radii are rooted in the universal behavior of three-body systems close to the Efimov limit and depend only on dimensionless quantities formed by the two-neutron separation energies and scattering lengths. Our results show in practice the model independence of these scaling functions close to unitarity. We provide an estimation of the different rms relative separation distances between the constituents, as well as of the proton and matter radii. (AU)

• Processo FAPESP: 19/07767-1 - Reações nucleares com núcleos fracamente ligados ou com estrutura de cluster, radioativos e estáveis
• Beneficiário: Leandro Romero Gasques
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/05660-0 - Estudos teóricos da estrutura e reações de núcleos exóticos e sistemas de muitos corpos
• Beneficiário: Brett Vern Carlson
• Modalidade de apoio: Auxílio à Pesquisa - Temático