In this paper we present numerical calculations for the process of bound-free electron-positron pair production following photon impact on bare nuclei. The calculations are based on exact Coulomb waves. We include total as well as differential cross sections for production of both K and L electrons for a wide range of photon energies and nuclear charge numbers. Significant deviations from lowest-order Born theory appear for moderate and high charge numbers in both the total cross section and, most dramatically, in the angular distributions of the emitted positrons. Our results for total K-shell cross sections for photon impact as well as for ion impact, in the latter case as estimated by the virtual photon method, basically confirm those of Aste et al. ͓Phys. Rev. A 50, 3980 ͑1994͔͒. However, we note that by inclusion of L-electron production, the cross section for the ion-induced process is increased by approximately 20% for heavy elements. ͓S1050-2947͑97͒05701-6͔ PACS number͑s͒: 34.90.ϩq, 32.90.ϩa, 32.80.Fb, 13.40.Ϫf 2 ͚ ,,m ͵ d⍀ d͑, ͒ d⍀ . ͑1͒Alternatively, the sum may be taken over angularmomentum eigenstates ͑partial waves͒, so that,In these equations and represent the helicities of the incoming photon and outgoing positron, respectively, m is the magnetic quantum number of the bound electron and J, L, and M are the angular-momentum quantum numbers of the partial wave. Obviously, is absent from Eq. ͑2͒ and J, L, and M from Eq. ͑1͒. Since the Coulomb-Dirac wave functions may only be obtained as a partial-wave expansion, the approach ͑2͒ is taken in this section. The process of bound-free pair production may be viewed as the excitation of an electron from the negative-energy continuum to a bound state. Consequently, the partial cross section JLM is similar to the usual photoabsorption cross