"Born approximation 1" phi = -Z alpha hbar c / (2 E (1 - cos(theta))) E = 1/2 m v^2 hbar = 1 c = 1 "Verify equation (1) with Lancaster and Blundell equation (40.4)" check(conj(phi) phi == Z^2 alpha^2 / (4 m^2 v^4 sin(theta/2)^4)) "ok" Run