C-19 - THE HEAVIEST ONE-NEUTRON HALO NUCLEUS

We have investigated the loosely bound halo candidate C-19 in a neutro n + core coupling model. A deformed Woods-Saxon potential is used for the neutron-core interaction and the coupled channels equations are so lved with Sturmian expansions of the relative motion wave functions fo r experimental neutron separation energy. Longitudinal momentum distri butions, the r.m.s. matter radius, the neutron stripping cross-section and the electromagnetic dissociation cross-section are calculated and compared with the sparse available data. An assessment of the possibl e character of C-19 is made, and in particular, of the role of s-orbit al motion between halo-neutron and core.