Gaussian band 

https://doi.org/10.1351/goldbook.08252
Spectral band with the shape HGexp[4ln2(ν~ν~0)2/W2], where HG is the band maximum (peak height), W is the full width at half maximum, and ν~0 is the peak wavenumber.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 660 [Terms] [Paper]