Constraints on two-neutron separation energy in the Borromean $^{22}$C nucleus
Abstract
The recently extracted matter radius of carbon isotope C 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 virtual state. Our analysis, in a renormalized zero-ranged three-body model, also indicates that the two-neutron separation energy in C is expected to be found below 0.4~MeV, where the C is approximated by a Borromean configuration with a pointlike C and two -wave halo neutrons. A virtual-state energy of C close to zero, would make the C, within Borromean nuclei configurations, the most promising candidate to present an excited bound Efimov state or a continuum three-body resonance.
Keywords
Cite
@article{arxiv.1101.0988,
title = {Constraints on two-neutron separation energy in the Borromean $^{22}$C nucleus},
author = {M. T. Yamashita and R. S. Marques de Carvalho and T. Frederico and L. Tomio},
journal= {arXiv preprint arXiv:1101.0988},
year = {2015}
}