Elastic collisions of low- to intermediate-energy electrons from carbon dioxide: Experimental and theoretical differential cross sections

Absolute elastic differential cross sections for electron collision with carbon dioxide (CO₂) at impact energies from 1.5 to 100 eV and scattering angles from 15^∘{} to 130^∘{} have been measured. Also, a calculation has been made that uses two different types of close-coupling approaches and covers all scattering angles in the same energy region. The measurements are in excellent agreement with observations by other authors. They also agree with the present calculation for all energies above 10 eV. The agreement becomes less satisfactory as the energy decreases below 8 eV, particularly at scattering angles below 60^∘{}, where the measurements show a conspicuous shoulder around this angle in the energy between 5 and 7 eV. Integral and momentum-transfer cross sections have been estimated from extrapolations to 0^∘{} and 180^∘{}. Extensive comparisons with recent other theories are included.