Abstract
The authors present an analytical method for rapid calculation of matrix elements for double-atom excitation induced by the electron-electron interaction. The method is applied to calculation of probabilities and cross sections for double-atom n=2 excitation in H(1s)-H(1s) and various A(Zp-1)+(1s)-H(1s) collisions at intermediate and high projectile energies. Based on first-order perturbation theory an empirical scaling rule for the double-atom excitation cross sections is derived. The calculated cross sections are shown to be in good agreement with this scaling relation.
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