A two-parameter single-particle description of the ground state of two-electron atoms

I Porras
1995 Journal of Physics B: Atomic, Molecular and Optical Physics  
A simple variaional-type model for the ground state of wpelectron atom is here proposed. It is based on a single-panicle wavefunction with two free parameters generalizing the screened hydrogenic one, and which holds the Kat0 cusp condition exactly. The results for the expectation values of different properties including the energy are close io differenl Hai?ree-Fock ones reported in the literature.
doi:10.1088/0953-4075/28/20/004 fatcat:wjguiyovwngjdd4ljc6m4qgvfe