Abstract
We present the results of previous plane wave and current twisted wave electron double ionisation (e, 3e) near the threshold energy using the second Born approximation to calculate the fully differential cross section (FDCS)T-SBA and also calculate the fully differential cross section for plane wave using the second Born approximation (SBA) and including post-collision interactions (FDCS) PW+PCI of the He atom. We investigate the effect of different “m” parameters on orbital angular momentum (OAM) using the second Born approximation for both twisted and plane waves incident and scattered electrons. We compare our theoretical twisted wave results with experimental non-twisted results (i.e., plane wave); we found that the theoretical twisted wave results are in good agreement with experimental non-twisted (i.e., plane wave) results of He atoms.
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