Analytical description of classical trajectories and deflection function   in scattering
  Analytical expressions are derived for classical trajectories in repulsive Coulomb plus multi-step attractive potentials. Thereafter the closed form expressions are obtained for classical deflection functions. The expressions are expected to be of use in heavy ion interactions in nuclear physics. 
S. K. Gupta, Arun K. Jain, B. M. Jyrwa