This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
 

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Hydrogenic model and Hartree-Slater model give good results for evaluating the K-shell excitation cross-section. A comparison of K-edge and cross-section profiles for low atomic number (Z) elements [1] shows that the cross-section profiles present the K-edge roughly for an edge where the fine structures are important, e.g. for boron nitride (BN).

The ratio between different elements in a TEM specimen can be determined using Hartree-Slater cross sections in EELS.

[1] Ahn C. and Rez P., Ultramicroscopy 17 (1985) 105.