Laser-assisted single and double ionization of helium by electron impactстатья
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Дата последнего поиска статьи во внешних источниках: 19 сентября 2015 г.
Аннотация:We consider theoretically laser-assisted ionization of a helium atom by electron impact at large momentum
transfer. Fully differential cross sections of these processes are studied as functions of the recoil-ion momentum for the cases when the residual He^+ ion is left both in the bound (n = 1 and n = 2) and in the continuum states in the presence of a linearly-polarized laser field with frequency w = 1.55 eV and intensity I = 5×10^{11} W/cm^2. We inspect how the orientation of the polarization influences the laser-assisted momentum profiles using different models of the helium wave function. It is found that the Kroll-Watson sum rule is well applicable in the (e, 3 − 1e) case.