Quantum reflection of fast atoms from insulator surfaces: Eikonal description.

M.S. GRAVIELLE; J.E. MIRAGLIA

Kalamazoo, EEUU.

Conferencia; XXVI International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC); 2009

International Committee of XXVI ICPEAC

Interference effects recently observed in grazing scattering of swift atoms from insulator surfaces are studied within a distorted-wave method - the surface eikonal approximation. This approach makes use of the eikonal wave function, involving axial channeled trajectories. The theory is applied to helium atoms colliding with a LiF(001) surface along low-index crystallographic directions. The roles played by the projectile polarization and the surface rumpling are investigated.