Peak profile¶
Choose a profile¶
On Experiment → Main, expand Peak profile. Choose a profile appropriate to the experiment, then inspect or edit the displayed width, mixing and asymmetry parameters. The selector follows the experiment type.
The choices shown for this experiment link to their equations:
- Gaussian
- Lorentzian
- Pseudo-Voigt
- Pseudo-Voigt + Bérar-Baldinozzi asymmetry
- Thompson-Cox-Hastings pseudo-Voigt (TCH)
- Thompson-Cox-Hastings pseudo-Voigt (TCH) + Finger-Cox-Jephcoat asymmetry (FCJ)
Compare peak widths and shapes across the pattern before choosing parameters to fit. See peak profiles for the full models.
Set the calculation window¶
On Experiment → Extra, expand Peak cutoff. Set how far each peak is calculated, in multiples of its full width at half maximum. Check the pattern after changing the window, especially for broad tails.
This controls the calculation window; fit profile parameters on Analysis.
