Interference Effect In Fully Differential Cross-sections For Heavy-ion Single Ionization Of Helium

The four distorted wave (4DW) model has been used to calculaetthe fully differential cross-sections (FDCS) for the single ionizationof helium by two heavy-ions. For10OMeV/amuimpact He ingeometries, our results are compared with experiments丨data andother theories and we find the result of4DW model very goodagreement in the scattering plane, but poor agreement out of thescattering plane. For16MeV Oz+impact He in the scattering plane,we find that the result of4DW model poor agreement withmeasurement. Accordingly, the contributions of differentscattering amplitudes to FDCS are analyzed. It is found thatscattering amplitudes have significant influence to FDCS. Inparticular in the perpendicular plane, the cross section originatingfrom intefrerence of the scattering amplitudes betweenprojectile-target nucleus and projectile-ejected electroninteractions yields an experimental double-peak structure in theangular distribution. However, this feature could not be presented by the interference of the three amplitudes. In addition, for07+impact He we also study the results of4DW-noPCI, except for largomomentum transfer, the binary peak locate at the direction of themomentum transfer at small and intemediato momentum transfer.