Title : ELECTRON IMPACT IONISATION OF ETHANE Authors : Surekha Tomar, M. K. Sharma and S. P. Khare Physics Department Affilliations : C.C. S. University, Meerut, India. Summary :- A simple model based on the plane wave Born approximation (PWBA) has been developed and applied to calculate total ionisation of ethane molecule due to electron impact from 15 eV to 3 MeV. The theoritical cross sections are in satisfactory agreement with a number of experimental data.