| Popis: |
The excitation scattering of electrons from helium atoms is investigated for the case of transition to the first excited singlet metastable level in order to examine quantitatively the error introduced by the fact that the description of the helium target is only approximately known. The cross section is calculated in Born approximation using formally equivalent matrix elements which weight the wave functions differently in space. The shape of the total cross section-energy curve is the same although absolute values differ while the angular distributions are considerably different. |
