Multiconfiguration Dirac-Hartree-Fock calculations of the electric dipole moment of radium induced by the nuclear Schiff moment

The multiconfiguration Dirac-Hartree-Fock theory has been employed to calculate the electric dipole moment of the $7s6d{{}^{3}D}_2$ state of radium induced by the nuclear Schiff moment. The results are dominated by valence and core-valence electron correlation effects. We show that the correlation effects can be evaluated in a converged series of multiconfiguration expansions.

Figure 1

Nuclear charge density $\rho$ (a.u.) as function of the nuclear radius $r$ (fm), using a two-parameter Fermi distribution for the ${}_{88}{}^{225}\text{R}\text{a}$ nucleus.

Figure 2

The values of the reduced matrix elements of the (a) Schiff and (b) EDM operators as functions of the size of the multiconfiguration expansion.