Variational Calculation of Magnetic Hyperfine Interaction. Nitrogen Atom

摘要

A variational method, employing the unrestricted Hartreehyphen;Fock approximation, is proposed for the calculation of isotropic magnetic hyperfine constants in paramagnetic atoms and ions with unpaired electrons in nonhyphen;Sstates and in free radicals. The method is applied to the ground state of the nitrogen atom. The N14hyperfine constant in the ground state is calculated to be +7.3 Mc as compared to the recent experimental value of +10.4509plusmn;0.0003 Mc. Reasons for the discrepancy are discussed.