High BE Endpoints

High BE Endpoints

To peak-fit or generate atom% results from narrow scan, chemical state spectra, we must define both a low BE endpoint and a High BE Endpoint.

Defining the position of the low BE endpoint is usually easy and straightforward. Defining the position of the High BE Endpoint can be very difficult for various materials and also conductive materials.

Raw Fe (2p) Spectrum from Fe2O3 of a natural crystal of Hematite.

Using a Linear Baseline to produce Atom% values from Fe2O3, the data-analyst can choose different natural features for the Fe (2p) spectrum. There are three (3) natural breakpoints that can be used to define the High BE Endpoint. The choice is complicated by the proximity of Fe Auger signals that may or may not overlap the Fe (2p) spectrum.

Using a Linear Baseline to produce Atom% values from Fe2O3, the data-analyst can choose different natural features for the O (1s) spectrum. There are four (4) natural breakpoints that can be used to define the High BE Endpoint. Because we are including Intrinsic satellite features for the Fe (2p) spectrum the data-analyst should do the same when selecting High BE Endpoints for the O (1s) spectrum.