AAnalyzer

AAnalyzer® is a software for peak-fitting photoemission data. It was developed by Alberto Herrera-Gomez at CINVESTAV-Unidad Queretaro. It is currently distributed by RDATAA.

Features
AAnalyzer® contains all the standard options of a photoemission fitting program (e.g., true Voigt functions, Doniach-Sunjic line shape, Shirley-Sherwood background, and two and three-parameter Tougaard backgrounds, among others). All the parameters that it employs have a direct physical interpretation. In addition, it contains some special features that are unique to AAnalyzer®.

Active Background. The active background always provide better fits than the traditional method. (The active background method in XPS data peak-fitting. Internal Report. Cinvestav-Queretaro.(2011).)

Peak-Shirley Background. This is a variant of the Shirley background that does not require iterations. It does not require setting the range limits for the generation of the background (i.e., the choice of the two points in each side of the spectrum). This makes the fit much less dependent on the operator. (The peak-Shirley background. Internal Report. Cinvestav-Queretaro.(2011).)

Slope Background. This models in a very simply way the change on the slope of the background between the two sides of the peaks. In combinations with the Shirley background, provides excellent fits for a wide range of spectrum shapes. (The Slope Background for the near-peak regimen of photoemission spectra. Internal Report. Cinvestav-Queretaro.(2011).)

Double-Lorentzian Line Shape. This provides an excellent integrable option to the Doniach-Sunjic line shape. (A double Lorentzian shape for asymmetric photoelectron peaks. Internal Report. Cinvestav-Queretaro.(2011).)

Simultaneous Fitting. This is an excellent tool for discriminating overlapping peaks. (Resolving overlapping peaks in ARXPS data: The effect of noise and fitting method. J. Muñoz-Flores, A. Herrera-Gomez, J. Electron Spectrosc. Relat. Phenom. 184 (2012) 533.)