Singh, C. S.2015-06-112015-06-112005east African Journal of Physical Sciences 6(2): 67-77 (2005)1729-5106http://ir-library.ku.ac.ke/handle/123456789/12878Research ArticleWe have applied a distorted wave method to calculate the differential cross sections for 2 1S excitation of helium atom by electron impact in the energy range of 50-200 eV. The results are compared with some other theoretical and experimental results. There is one interesting observation - for 60°1scattering angle the Present differential cross section results at 80, 100 and 200 eV impact energies almost coincide with the experimental results.enElectron impact excitationDifferential cross sectionHelium atomDistorted wave methodArticle