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Three-photon detachment of electrons from the fluorine negative ion

G. F. Gribakin, V. K. Ivanov, A . V. Korol, M . Yu. Kuchiev

physics.atom-pharXiv:physics/9910007

Abstract

Absolute three-photon detachment cross sections are calculated for the fluorine negative ion within the lowest-order perturbation theory. The Dyson equation of the atomic many-body theory is used to obtain the ground-state 2p wavefunction with correct asymptotic behaviour, corresponding to the true (experimental) binding energy. We show that in accordance with the adiabatic theory (Gribakin and Kuchiev 1997 Phys. Rev. A 55 3760) this is crucial for obtaining absolute values of the multiphoton cross sections. Comparisons with other calculations and experimental data are presented.

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