Dependence of the angular distributions in photoionization of H⁺₂ on the initial and final state representation

We present a detailed study of the angular distribution in photoionization of H⁺₂ in different geometrical arrangements between the internuclear axis and the polarization vector. We compare the results of an exact calculations with those obtained employing approximate initial and final state wave functions. We find large and unexpected differences if we employ the 2C or exact final state continuum wave functions with the same initial state. We find also that the results depend on the accuracy of the initial bound state. As the quality of the final state is improved we obtain results in closer agreement with the exact angular distributions.