The orientation-dependent simulation of ELNES

We describe a program that allows the simulation of energy-loss near edge s tructure (ELNES). As an extension to the WIEN97 package (a full potential l inearized augmented plane wave package for calculating crystal properties) [1] it permits to separate different contributions to the inelastic scatter ing cross section according to the character of the final state, explicitly taking into account projection onto scattering vector and integration over collection and convergence angle. Thus the program facilitates analysis of ELNES under precisely defined experimental conditions, and allows the inve stigation of anisotropic effects in ELNES from crystal structures. Dipole-a llowed as well as dipole-forbidden transitions can be analyzed with this pr ogram. (C) 2000 Elsevier Science B.V. All rights reserved.