30.1.140 PsdVoigt2

1 Function
2 Brief Description
3 Sample Curve
4 Parameters
5 Script Access
6 Function File
7 Category

Function

$y=y_0+A\left[ m_u\frac 2\pi \frac{w_L}{4\left( x-x_c\right) ^2+w_L^2}+\left( 1-m_u\right) \frac{\sqrt{4\ln 2}}{\sqrt{\pi}w_G}e^{-\frac{4\ln 2}{w_G^2}\left( x-x_c\right) ^2}\right]$

Brief Description

Pseudo-Voigt function, linear combination of Gaussian and Lorentzian with different FWHM.

Sample Curve

Parameters

Number: 6

Names: y0, xc, A, wG, wL, mu

Meanings: y0 = offset, xc = center, A =area, wG=Gaussian FWHM, wL=Lorentzian FWHM, mu = profile shape factor

Lower Bounds: wG > 0.0, wL > 0.0

Upper Bounds: none

Script Access

nlf_psdvoigt2(x,y0,xc,A,wG,wL,mu)

Function File

FITFUNC\PSDVGT2.FDF