We 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 ...

The Coulomb-projected Born method proposed by Geltman has been generalized by using the screened Coulomb potential of the form in place of the nuclear potential experienced by the incident electron. The results obtained ...

We have used a distorted wave model suggested by Singh in calculating the angular correlation parameters f... and R for electron-hydrogen collision. In this model the initial state distorted wave is generated by the ...

The accuracy and reliability of any theoretical scattering model relies on the wave functions used and the energy of the projectile. Perturbation methods are known to be accurate at intermediate and high energies of the ...

Differential and total cross sections for 11S-23S and 11S-23P excitation of helium atom has been calculated using distorted wave method. The distortion potential is taken as the static potential of the helium atom in the ...