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In this work, we present a theoretical study on elastic electron collisions with the four C 2 N 2 isomers. More specifically, calculated differential, integral, and momentum transfer cross sections are reported in the 1 -100 eV energy range. Calculations are performed at both the static-exchange-absorption and the staticexchange-polarization-absorption levels. The iterative Schwinger variational method combined with the distorted wave approximation is used to solve the scattering equations. Our study reveals an interesting trend of the calculated cross sections for the four isomers. In particular, strong isomer effect is seen at low incident energies. Also, we have identified a shape resonance which leads to a depression in the calculated partial integral cross section.

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