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Hydrogenic model and HartreeSlater model give good results for evaluating the Kshell excitation crosssection. A comparison of Kedge and crosssection profiles for low atomic number (Z) elements [1] shows that the crosssection profiles present the Kedge roughly for an edge where the fine structures are important, e.g. for boron nitride (BN).
Figure 4614 shows the cross section of Kshell ionization process in Al as a function of the incident electron energy at the scattering angles of ~ 0°. For comparison, the figure also shows cross sections for the elastic and various inelastic scattering processes.
Figure 4614. Cross sections for the elastic and various inelastic scattering processes in Al as a function of
the incident electron energy at scattering angles of ~ 0°.
Based on a nonrelativistic theory, Allen and Rossouw [2] calculated the inelastic object functions for Kshell ionization. The calculated object functions for the Kshell excitations of some elements such as Te, Cd, As and Ga indicate that the localization of the object is less than 1 Å [3].
[1] Ahn C. and Rez P., Ultramicroscopy 17 (1985) 105.
[2] L.J. Allen, C.J. Rossouw, Phys. Rev. B 42 (1990) 11644–11654.
[3] N.D. Browning, S.J. Pennycook, Microbeam Anal. 2 (1993) 81–89.
