## Lorentzian band shape

https://doi.org/10.1351/goldbook.L03628
This band shape is described by the function: $F\left(\nu - \nu _{0}\right) = \frac{1}{\pi }\ \gamma \ ((\nu - \nu _{0})^{2}+\gamma ^{2})^{-1}$ where $$\nu_{0}$$ is the mean band position, $$\gamma$$ is the half band width at half maximum, and $$F\ (\nu - \nu _{0})$$ is the @F02526@ function.
See also:
Gaussian band shape
Source:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2252 [Terms] [Paper]