The scattering of atoms from a corrugated wall model with the GR method in the system He/LiF(001)

In this communication a new method is presented, called GR, to calculate the diffraction probabilities of atomic beams from a hard corrugated surface model. The method is applied to the system He/LiF(001). It is shown that the method gives a convergent solution, within 10-4 in unitarity, when β0<=0.12, where β0 is the dimensionless total corrugation amplitude. This limit suggests that the method converges for 'any' crystallographic surface of interest. The agreement between the experimental data and the calculated curves is good. From this agreement it is concluded that the surface corrugation for He/LiF(001) is cosine-like and the 'best' corrugated surface is given. (Auth.)