Neutron halo state of C-13

Angular distributions for the C-12(d, p)C-13 transfer reactions have been m easured at Ed = 11.8 MeV, and compared with those of the DWBA calculations. By means of this comparison, density distributions of the last neutron in the ground state and the first 1/2(+) state of C-13 are extracted. The prop erties of these states in C-13 have also been studied in the framework of t he nonlinear relativistic mean-field theory with NL-SH parameters. It is fo und that the first 1/2(+) state in C-13 is a neutron halo state shown by bo th the experimental and theoretical density distributions of the last neutr on.