backscatter

Also contains definition of: forward scattering
https://doi.org/10.1351/goldbook.B00581
@[email protected] of radiation in a generally backward direction. In the @[email protected] of @[email protected], it applies to the @[email protected] of radiation into the @[email protected] from any material except the sample and the detector. In @[email protected], it is said to occur when the @[email protected], \(\theta \), is \(180^{\,\unicode{x26ac}}\). Conversely, forward scattering occurs when \(\theta \) is \(0^{\,\unicode{x26ac}}\).
Sources:
Orange Book, 2nd ed., p. 213 [Terms] [Book]
PAC, 1983, 55, 931. (Definitions, terminology and symbols in colloid and surface chemistry. Part 1.14: Light scattering (Provisional)) on page 932 [Terms] [Paper]