Corrections to the Nonrelativistic Ground Energy of a Helium Atom
Yi-Shi Duan, Yu-Xiao Liu, Li-Jie Zhang
Abstract
Considering the nuclear motion, the authors give out the nonrelativistic ground energy of a helium atom by using a simple but effective variational wave function with a flexible parameter k. Based on this result, the relativistic and radiative corrections to the nonrelativistic Hamiltonian are discussed. The high precision value of the helium ground energy is evaluated to be -2.90338 a.u., and the relative error is 0.00034%.
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