Profile Parameters Refinement Dialog

 

Asymmetry Parameters

 

 

 

The default asymmetry correction is a multiplier term to the peak shape. The asymmetry correction adopts the form:

 

 

 

                                 

 

where

 

                                                                           

 

  includes the zero-point and other shifting terms,

 

                            

 

The asymmetry correction has four independent parameters,  which are read as (Asym1…4).

 

The profile is calculated as a superposition of five profile functions  (only Pseudo-Voigt and TCH Pseudo Voigt are implemented for this correction) calculated at displaced points:

 

             

 

where , P is the asymmetry parameter and .

 

 

D_L, S_L

Asymmetry parameters corresponding to the L. Finger formulation of the axial divergence.

 

 

 

Colour notes