Question

Definition of cross section We use the scattering angle to define the cross section weak scattering strong scattering θ (scattering angle) Relation between scattering angle and cross section Number of particles scattered into the solid angle d2 (6,9) is given by dN-N σ (θ, φ) dS: N do (θ, φ) → σ (0、4) represents the occurrence rate of a scattering process with θ、φ This number is equal to the number of particles passing through the area db b dp, given by dN N db b do N partides are injecded during unl Time dh b b db Since σ (θ. Φ) has the dimension of area it is called . differential cross section" that gives the occurrence rate of tis scattering process By integrating σ (θ, φ) over Ω we obtain the total cross section: θ4) depends on b-b θ φ which is determined by the feature of a particle (eg shape, charge, etc.) and interacting force. σ Question 1: In the case of rigid-body collision (collision between neutrals with the radius ro), show that rigid Then calculate Ơngid (e) and Ơngid

Answer 1

거 mgid