Boniface Otieno Ndinya, Florence Mutonyi D’ujanga, Jacob Olawo Oduogo, Andrew Odhiambo Oduor, Joseph Omolo Akeyo (SPG, 2015)
Simple analytic first-order wave functions corresponding to two-electron atoms electron correlation operators are
obtained by reduction of the Rayleigh-Schrödinger first order perturbation equation to that of one-electron ...