2ND-ORDER DISTORTED-WAVE CALCULATION FOR ELECTRON-COPPER SCATTERING

Second-order distorted-wave Born results are reported for electron-cop per scattering for incident electrons with energy between 10 and 100 e V. The importance of the second-order effects of polarization and abso rption is examined. Both differential and integrated cross sections ar e presented and compared with existing experimental and theoretical re sults. Good agreement between experiment and theory is found for the i ntegrated cross sections if the theoretical results are adjusted to th e known optical oscillator strength. For the differential cross sectio ns, on the other hand, there is almost an order of magnitude differenc e between theory and experiment for large scattering angles.