Abstract
A prescription is proposed for the calculation of inner shell ionization cross sections of neutral atoms (e.g. carbon, argon etc.) by electron impact in coplanar geometry. As a first step, triple differential cross sections (TDCS) are calculated for the K-shell ionization of carbon atom by fast electron impact for highly asymmetric kinematics. The distinguishing feature noted in the TDCS structure is the presence of intense recoil peak which for certain parameters is even larger than the binary peak, an unusual feature for the outer shell ionization process. Results are compared with the relative measurement performed on the C2H2 molecule as target. The binary to recoil peak intensity ratio of the present TDCS is found to be in good accord both with the experiment as well as with another theory.
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