High-resolution angular distributions of Na atoms in the ground state or in the excited ( 2P) state scattered from ground state Xe atoms were measured for relative velocities between ∼800 and ∼1300 ms -1. Difference signals ΔI = I ( laser off) - I( laser on) were obtained for angular positions of the surface ionization detector between -25° and +25° in the laboratory system in an out-of-plane configuration. With “laser on” the excited Na ∗ atoms can be scattered according to three interaction potentials, viz. B 2Σ 1 2 , A 2Σ 3 2 , A 2Π 1 2 , A 2Π 1 2 , whereas t large, unavoidable fraction of ground-state Na atoms scatters according to a 2Σ 1 2 curve. Using appropriate potential models, we calculated scattering patterns in the elastic approximation and compared them with the experimental ones. Best-fit parameters were obtained by varying the potential parameters, followed by visual inspection. The parameters of a Lennard-Jones (12,6) potential model for the B 2Σ 1 2 curve are ϵ = [0.4∓0.2) ×10 -14 erg, r m = (7∓2(×10 -8 cm; those for a Lennard-Jones (7,6) model for the degenerate A 2Π 3 2 1 2 curve are ϵ = (27∓6)x10 -14erg, r m=(3.5∓0.2 5)x10 -8cm . Thus, the well-depth for the AΠ potential lies between the well-depths calculated by Baylis and by Czuchai and is much larger than those calculated by Pascale and Vandeplanque and by Düren and Moritz.