Low-energy electron scattering from gaseous CS2: angular distributions and effect of exchange forces

Ab initio calculations are reported for the quantum scattering of electrons from CS2 molecules in the gas phase and for energies which range from near threshold up to about 100 eV. Angular distributions are examined in detail and an extensive comparison is made with existing experiments and earlier calculations. The agreement found with the latter data is fairly good and results are further discussed in terms of a physical mechanism of “exchange level shifting" to explain the disappearance of a Πu resonance suggested by earlier studies.