Asymmetry Using Asymmetry for Peak-fitting Example #1: Aluminum (Al) metal – Al (2p3) & Al (2p1) Neal Fairley’s Peak-fit of Al (2p) using CasaXPS using a convoluted hybrid of Doniach-Sunjic peak shape and Gaussian-Lorentzian. Example #2: Asymmetry in Manganese and Chromium