double_voigt_approx_nobg¶
-
mcalf.profiles.voigt.
double_voigt_approx_nobg
(x, a1, b1, s1, g1, a2, b2, s2, g2)[source]¶ Double Voigt function (efficient approximation) with no background.
- Parameters
x (numpy.ndarray) – Wavelengths to evaluate Voigt function at.
a1 (float) – Amplitude of 1st Voigt function.
b1 (float) – Central line core of 1st Voigt function.
s1 (float) – Sigma (for Gaussian) of 1st Voigt function.
g1 (float) – Gamma (for Lorentzian) of 1st Voigt function.
a2 (float) – Amplitude of 2nd Voigt function.
b2 (float) – Central line core of 2nd Voigt function.
s2 (float) – Sigma (for Gaussian) of 2nd Voigt function.
g2 (float) – Gamma (for Lorentzian) of 2nd Voigt function.
- Returns
result – The value of the Voigt function here.
- Return type
numpy.ndarray, shape=`x.shape`
See also
voigt_approx_nobg()
Base approximated Voigt function with no background.
voigt_approx()
Approximated Voigt function with background added.
double_voigt_approx()
Two approximated Voigt functions and a background added together.
voigt_nobg()
Base Voigt function with no background.
voigt()
Voigt function with background added.
double_voigt_nobg()
Two Voigt functions added together.
double_voigt()
Two Voigt function and a background added together.
Notes
This algorithm is taken from A. B. McLean et al. 1.
References
- 1
A. B. McLean, C. E. J. Mitchell and D. M. Swanston, “Implementation of an efficient analytical approximation to the Voigt function for photoemission lineshape analysis,” Journal of Electron Spectroscopy and Related Phenomena, vol. 69, pp. 125-132, 1994. https://doi.org/10.1016/0368-2048(94)02189-7