Peak Shape: Pseudo Voigt

 

 

 

                                                        

 

                                                                                

 

where .

 

The  function is a linear combination of a Lorentzian (L)and a Gaussian (G) of the same FWHM (H), so there are two parameters characterising the peak shape: . If  and  are normalised,  is also normalised. The integral breadth of a normalised pseudo-Voigt function is just the inverse of the maximum value. The FWHM is the same for L(x), G(x) and pV(x).