https://doi.org/10.1351/goldbook.08252
Spectral band with the shape \(H_{\rm{G}} \exp[-4\ln 2{(\tilde{\nu} - \tilde{\nu}_{0})}^{2}/W^{2}]\), where \(H_{\rm{G}}\) is the band maximum (peak height), \(W\) is the full width at half maximum, and \(\tilde{\nu}_{0}\) is the peak wavenumber.