Slow electron elastic scattering cross sections for In, Tl, Ga and at atoms

摘要

The complex angular momentum (CAM)-calculated, low-energy 0 E 5 eV electron elastic total cross section (TCS) for In is benchmarked through its recently measured electron affinity in Walter et al (2010 Phys. Rev. A 82 032507). The TCSs for Tl, Ga and At atoms are then calculated using the CAM method. From the dramatically sharp resonances in the TCSs, binding energies for Tl, Ga and At negative ions formed during the collisions as Regge resonances are extracted and compared with the existing experimental and theoretical values.