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Phys Rev Lett. 2014 Jan 17;112(2):023202. Epub 2014 Jan 15.

Parametrization of electron-impact ionization cross sections from laser-excited and aligned atoms.

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Photon Science Institute, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom.


A set of parameters describing electron-impact ionization from laser-aligned atoms are reported, which define the "length", "width", and "direction" of the quadruple differential cross section (QDCS) as a function of target alignment kB for fixed ingoing electron momentum k0 and outgoing momenta k1, k2. 24Mg was used, with k0, k1, k2, and kB in the same plane. The parameters are derived for a range of k2 angles, with k1 set at 30° to k0. The QDCS is then determined for all kB. The parameters are very angle sensitive, the QDCS direction varying more than 90° as the length to width ratio varied more than an order of magnitude.

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