Journal
PHYSICAL REVIEW C
Volume 94, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.94.064002
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Funding
- Brazilian agency Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- Brazilian agency Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Brazilian agency Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Direccion General de Investigacion Cientifica (DGI) of Ministerio de Economia, Industria y Competitividad (MINECO) (Spain) [FIS2014-51971-P]
- Vicepresidencia de Investigacion Cientifica y Tecnica (VICyT) (Consejo Superior de Investigaciones Cientificas (CSIC)) [i-LINK 1056]
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The structure of the two-neutron halo C-22 is investigated by means of a renormalized zero-range three-body model, with interactions in the s-wave channel, and a finite-range model with two-and three-body forces provided by the hyperspherical adiabatic expansion method. In both models the halo wave function in configuration space is obtained by using as inputs the two-body scattering lengths and the two-neutron separation energy. The halo-matter density is computed for C-22 with different three-body forces and low-energy parameters, with two-neutron separation energy within the range 50 keV <= S-2n <= 1000 keV. The halo-neutron density depends weakly on the neutron-C-20 scattering length as long as its absolute value is larger than the neutron-neutron one. The halo-neutron density is then analyzed by means of the root-mean-square radius, the probability density, and also the geometry, taking into account the angle between the two Jacobi coordinates. The results of finite-range and zero-range two-neutron-core models are compared. The effects in the halo structure of short-range and long-range three-body forces are studied, and the emergent universal behavior of the halo-neutron density and its geometry is pointed out.
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