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VOLUME 58 (1993) | ISSUE 8 | PAGE 649
Electronic structure and adiabatic oscillations of metal clusters
The electronic structure of metal clusters is analyzed as a function of geometric parameters. The Hartree-Fock approximation is used to calculate the electron energies and wave functions as a function of the radius of the cluster core, R. New equilibrium values of R are derived for clusters with various numbers of atoms N. A collective motion of a new type is predicted and studied: adiabatic oscillations of the space charge density of the cluster core or (equivalently) of the effective core radius R. The frequencies and amplitudes of these parametric oscillations are calculated for clusters with various values of N.