(e,2e) reactions for He+ and Li2+ ions from their excited states. Scaling law.

In this work, theoretical triply differential cross sections for ionization of several hydrogenic atoms from excited states by fast electron impact ar e computed in the case of asymmetric coplanar geometry The final wave-funct ion is chosen as an approximate solution to the three-body scattering probl em with correct asymptotic conditions. The initial wavefunction also satisf ies correct boundary conditions. Results for Li2+ ions in their 2s and 2p e xcited states are presented. In addition, it is shown that a simple scaling law for the triply differential cross sections obtained for ionization of hydrogenic targets from their ground state is also satisfied by excited hyd rogenic targets.