Abstract
The effect of target polarization by the projectile along with the electron - electron angular correlation in it on the angular distribution of triple differential cross section for the ionization of helium close to threshold is studied. The target polarization is estimated variationally and the cross section is calculated in the distorted-wave Born approximation with suitable effective charges for the asymptotic description of the final state at 26.6 eV incident energy with equal energy sharing. The target polarization/correlation is found to lead to a substantial change in the cross section. The agreement with experimental data in kinematical arrangement with is very good.
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