Hyperfine Structure of Oxygen Calculated by Many-Body Theory. II

Many-body perturbation theory is used to calculate the contributions to the hyperfine structure of atomic oxygen from the orbital, spin-dipolar, and quadrupole interactions. The resulting values for 〈rₗ^-3〉 and 〈rsd^-3〉 are 4.56 a. u. and 5.170 a. u., respectively, which are in good agreement with those measured by Harvey. Our calculated value for 〈rq^-3〉 is 4.216 a. u., which together with Harvey's measured value for b₂, leads to a nuclear quadrupole moment for O¹⁷ of -0.0263×{}10^-24 cm².