Ground-state Ps formation in e+-H2 scattering using the FBA

Ground-state capture cross sections in e+-H2 scattering are calculated in the energy region 10-1000 eV using the first Born approximation. The approximation employed by Sural and Mukherjee (1970) in predicting the first Born capture cross section is found to be unjustified. Present capture cross sections for incident positron energies E>or=30 eV are in good agreement with the measured data.