Photoabsorption and photoionization cross sections of spherical sodium clusters are calculated using the density functional method. The core of Na10+ ions are frozen into a jellium sphere and the valence electron cloud is treated by the Kohn-Sham formalism. Two approximations are employed: one that omits the electon correlation and other that incorporates it. The correlation induces an energy up-shift and redistribution of the oscillator strength (OS). The dominant part of this blue-shifted OS builds the surface plasmon below the first ionization threshold, while the remaining part moves above the threshold and produces multiple structures in the ionization continuum.
ASJC Scopus subject areas
- Physics and Astronomy(all)