Anisotropy parameters in two-color two-photon above-threshold ionization
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Angular anisotropy parameters and recoil-ion momentum distribution in two-photon double ionization of helium
We present convergent-close-coupling CCC calculations of the angular anisotropy parameters 2 , 4 and the recoil ion momentum distribution d /dp in two-photon double ionization TPDI of helium. In a stark contrast to single-photon double ionization SPDI , where the 2 parameter varies widely changing the angular distribution from isotropic to nearly dipole for slow and fast photoelectrons, respect...
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