2-PHOTON IONIZATION CROSS-SECTION CALCULATION FOR H2O

RESEARCH ARTICLE| DECEMBER 15 1988 Two-photon ionization cross section calculation for H2O Ionization cross section of H2 I. Cacelli; V. Carravetta; R. Moccia; A. Rizzo Crossmark: Check for Updates J. Chem. Phys. 89, 7301-7306 (1988) https://doi.org/10.1063/1.455311 Article history Split-Screen Click here to open pdf in another window PDFfor Share Icon Share Reprints and Permissions Search Site Cite Icon Cite The two-photon first ionization cross section was computed for H2O in the vertical transition approximation. A Stieltjes imaging technique was used to obtain from the results of a L2 basis set calculation, the two-photon oscillator strength density in the continuum. The calculations were performed in the independent particle static-exchange approximation for the final states. The ground-intermediate state transition matrix elements and excitation energies were computed by adopting the single channel static-exchange approximation or the multichannel random phase approximation; in the last case the intermediate-final state transition matrix elements were obtained by the equation of motion method. The calculated cross sections refer to the case of single beam of linearly or circularly polarized photons.