differential cross section

differential cross section

[‚dif·ə′ren·chəl ¦krȯs ‚sek·shən]
(physics)
The cross section for a collision process resulting in the emission of particles or photons at a specified angle relative to the direction of the incident particles, per unit angle or per unit solid angle.
References in periodicals archive ?
Suppose we have some criterion that provides an acceptable cut-off in l for the differential cross section, namely [l.sub.max].
The differential cross section for WIMP-electron scattering in an atom can be cast in a form containing the electron recoil energy:
The scattering amplitude of a red blood cell and the differential cross section per unit volume of blood are given by [1,14].
(1997) Product state(s) resolved differential cross section of the reaction O([sup.1]D)+HD[right arrow]OH(v,j)+D.
The calculation of NIEL requires information regarding the differential cross section for atomic displacements (d[sigma]/d[OMEGA]), the average recoil energy of the target atoms ([E.sub.r]), and a term which partitions the energy into ionizing and nonionizing events, called the Lindhard partition factor (L).
The Rutherford formula for the differential cross section, [sup.[sigma]] RUTH is then given by
This asymmetrical distribution is related to the polarization of he photons by the Bethe-Heitler differential cross section, which serves as a theoretical prediction for asymmetry measurements.
In the single scattering regime, which takes place if the sample thickness d much smaller than L, the differential cross section of the scatterers d[Sigma]([Omega])/d[Omega] may be measured.
Our interest is in calculating the differential cross section for the process, [e.sup.-]([p.sub.1])[e.sup.-]([p.sub.2]) [right arrow] [e.sup.-]([p.sub.3])[e.sup.-]([p.sub.4]), at finite temperature.
The resultant single differential cross section then reduces to the form
Accordingly, the differential cross section for the tree-level scattering of a massive spin-0 particle by an external weak higher-derivative gravitational field assumes the following form:
The P-odd asymmetry of interest to us measures the strength of the dependence of the differential cross section for the ([[right arrow].n], [gamma]) reaction on the pseudo-scalar [sigma] * [n.sub.[gamma]], where [sigma] is the transverse polarization of the neutron beam and [n.sub.[gamma]] is the unit vector in the direction of observed photon's momentum.

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