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The Relativistic Hartree Bogoliubov (RHB) model is applied in theself-consistent mean-field approximation to the description of the neutron haloin the mass region above the s-d shell. Pairing correlations and the couplingto particle continuum states are described by finite range two-body forces.Finite element methods are used in the coordinate space discretization of thecoupled system of Dirac-Hartree-Bogoliubov integro-differential eigenvalueequations, and Klein-Gordon equations for the meson fields. Calculations areperformed for the isotopic chains of Ne and C nuclei. We find evidence for theoccurrence of neutron halo in heavier Ne isotopes. The properties of the 1f-2porbitals near the Fermi level and the neutron pairing interaction play acrucial role in the formation of the halo. Our calculations display no evidencefor the neutron halo phenomenon in C isotopes.Comment: 7 pages, Latex, 5 P.S. Figures, To appear in Phys. Rev. Let

Relativistic Hartree-Bogoliubov Theory with Finite Range Pairing Forces in Coordinate Space: Neutron Halo in Light Nuclei