Close coupling calculation for the ionization plus excitation of helium by electron impact

We present triply differential cross section calculations for the simultaneous ionization and excitation of helium by electron impact. For the slow ejected electron wave function following the excitation to He{sup +}(2p), we include the effects of coupling to the He{sup +}(2s) and He{sup +}(1s) states by employing K matrix elements computed by Burke et al. Triply differential cross sections using the coupled and uncoupled wave functions are compared. Finally estimates of the total cross section are made and compared to experimental data.