The effective cross section of a gold nucleus corresponding to the scattering of monoenergetic alpha particles within the angular interval from 90° to 180° is equal to Δσ= 0.50 kb. Find:
(a) the energy of alpha particles;
(b) the differential cross section of scattering d*σ/d*Ω (kb/sr) corresponding to the angle θ= 60°.
