Two-neutron halo structure of F-31

摘要

We apply the Gamow shell model to study F25-31 isotopes. As both internucleon correlations and continuum coupling are properly treated therein, the structure shape of F-31 at large distance can be analyzed precisely. For this, one-nucleon densities, root-mean-square radii, and correlation densities are calculated in neutron-rich fluorine isotopes. It is then suggested that( 31)F exhibits a two-neutron halo structure, built from both continuum coupling and nucleon-nucleon correlations.