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Physics LibreTexts

11.2: Some terminology for general scattering

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The incident flux (I) of particles with momentum p=k is the number of incident particles crossing unit area perpendicular to the beam direction per unit time.

The scattered flux (S) of particles with momentum p=k, is the number of scattered particles scattered into the element of solid angle dΩ about the direction θ, ϕ per unit time per unit solid angle.

The differential cross section is the ratio of the scattered flux in direction θ, ϕ to the incident flux.

dσdΩ=S/I

The total cross section is the ratio of the scattered flux in any direction to the incident flux.

σT=dσdΩsinθdθdϕ


This page titled 11.2: Some terminology for general scattering is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by Graeme Ackland via source content that was edited to the style and standards of the LibreTexts platform.

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