Yamashita, Marcelo Takeshi [UNESP]Marques de Carvalho, R. S.Frederico, T.Tomio, Lauro [UNESP]2014-05-202014-05-202011-02-21Physics Letters B. Amsterdam: Elsevier B.V., v. 697, n. 1, p. 90-93, 2011.0370-2693http://hdl.handle.net/11449/24040The recently extracted matter radius of carbon isotope C-22 allows us to estimate the mean-square distance of a halo neutron with respect to the center-of-mass of this nucleus. By considering this information, we suggest an energy region for an experimental investigation of the unbound C-21 virtual state. Our analysis, in a renormalized zero-ranged three-body model, also indicates that the two-neutron separation energy in C-22 is expected to be found below similar to 0.4 MeV, where the C-22 is approximated by a Borromean configuration with a pointlike C-20 and two s-wave halo neutrons. A virtual-state energy of C-21 close to zero, would make the C-22, within Borromean nuclei configurations, the most promising candidate to present an excited bound Efimov state or a continuum three-body resonance. (C) 2011 Elsevier B.V. All rights reserved.90-93engBinding energiesFaddeev equationThree-bodyArtigo10.1016/j.physletb.2011.01.040WOS:000287790800018Acesso restrito37406397265453158621258845956348