scattering angle,, \(\theta\)

Synonym: angle of observation
https://doi.org/10.1351/goldbook.S05488
The angle between the forward direction of the incident beam and a straight line connecting the scattering point and the detector. Synonymous with angle of observation.
Sources:
Purple Book,1st ed., p. 65
PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2212 (https://doi.org/10.1351/pac199062112167)