Abstract
SynopsisThe electron impact single ionization of the outer valence orbital 1t2 of methane is investigated theoretically using an expansion on Generalized Sturmian Functions. Triple differential cross sections, calculated for several coplanar asymmetric geometries, are compared with other theoretical models and with two sets of relative experimental data (incident energy of 500 eV and 250 eV). An analysis with respect to the momentum transfer is presented. A double peak structure in the cross section binary region, a clear signature of the p-nature of the molecular orbital, is predicted for given kinematical conditions.
Highlights
We study the electron impact ionization of CH4 from the outer valence orbital 1t2
We calculate triple differential cross sections (TDCSs) for coplanar asymmetric geometries, and compare them with those obtained with other theoretical results, and with the relative scale measurements reported in Refs. [1] and [2], The binary to recoil ratio is analyzed as a function of the momentum transfer
The TDCSs are obtained using a Sturmian approach with generalized Sturmian functions (GSFs) [4]
Summary
We study the electron impact ionization of CH4 from the outer valence orbital 1t2. We calculate triple differential cross sections (TDCSs) for coplanar asymmetric geometries, and compare them with those obtained with other theoretical results (in an absolute scale), and with the relative scale measurements reported in Refs.
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