Abstract
Li2 has a huge polarizability and a huge elastic cross section for collisions with low-energy electrons. The recently developed molecular R-matrix with pseudostates (MRMPS) method is applied to electron collisions with Li2 at energies below 5 eV. The calculations, which are shown to be stable with respect to the choice of pseudostate basis, demonstrate the power of the MRMPS method for representing target polarizabilities and polarization effects in general. A previously identified low-lying 2Πu shape resonance is found at about 0.05 eV and several other low-lying resonances and resonance-like features are identified. Cross sections for elastic and electronically inelastic electron collisions are calculated and compared with previous studies.
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