Abstract
The theory of fast coplanar symmetric (e, 2e) reactions is analyzed. The calculation is performed in the framework of Coulomb-Volkov-Born approximation, where the initial and final electrons are described by Volkov wave functions, while the interaction of the fast incident electron with the target atom is treated in the first Born approximation. The state of the ejected electron is described by a Coulomb-Volkov wave function. We have considered two (e, 2e) spectroscopy regimes: (i) the regime in which the momentum transfer K is large, but the recoil momentum Q of the ion is small or moderate; and (ii) the regime of large K and large Q. The influence of the laser frequency on the angular distribution is analyzed and several illustrative examples are discussed.
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