Title: Continuum Effects for Positron
        Scattering from Sodium

 Authors: Kuru Ratnavelu and N. Natchimuthu

 Affliations: Institute of Mathematical Sciences
              University of Malaya
              50603 Kuala Lumpur, MALAYSIA

 Summary: Positron scattering from atomic sodium is studied at energies
          from 3 to 50 eV using the close-coupling approach that has
          allowed for the psoitronium effects aswellas the continuum
          effects. The continuum effects has been incorporated using the
          optical potential method.