The convenience afforded by the use of L-2 functions in the calculation of the photoionization cross-section and of others properties depending upon the electronic continuum has prompted the examination of particular basis sets that, among those derived, could be able to mimic the continuum states in an extended region of space. Here results are reported for the differential photoionization cross-section of the Li-2 molecule, where a mixed L 2 basis set comprising multi-center STOs plus single-center radial B-Splines times spherical harmonics was employed. (C) 2002 Elsevier Science B.V. All rights reserved.