A band shape described by the Gaussian function: \[F\left(\nu - \nu _{0}\right) = \frac{a}{\sqrt{\pi }}\ \text{e}^{-a^{2}\ (\nu - \nu _{0})^{2}}\] In this equation, a-1 is proportional to the width of the band, and ν 0 is the frequency of the band maximum.
See also: Lorentzian band shape
Source:
PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2244 (https://doi.org/10.1351/pac199668122223)
See also:
PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2192 (https://doi.org/10.1351/pac199062112167)