Critically evaluated theoretical energies, lifetimes, hyperfine constants, and multipole polarizabilities in 87Rb

Systematic study of Rb atomic properties is carried out using a high-precision relativistic all-order method. Excitation energies of the ns, np, nd, and nf (n <= 10) states in neutral rubidium are evaluated. Reduced matrix elements, oscillator strengths, transition rates, and lifetimes are determined for the levels up to n = 8. Recommended values and estimates of their uncertainties are provided for a large number of electric-dipole transitions. Electric-dipole (5s-np, n = 5-26), electric-quadrupole (5s-nd(j), n = 4-26), and electric-octupole (5s-nf(j), n = 4-26) matrix elements are calculated to obtain the ground state E1, E2, and E3 static polarizabilities. Scalar polarizabilities of the ns, np, and nd states, and tensor polarizabilities of the np(3/2) and nd excited states of Rb are evaluated. The hyperfine A and B values in Rb-87 are determined for the first low-lying levels up to n = 9. These calculations provide recommended values critically evaluated for their accuracy for a number of Rb atomic properties useful for a variety of applications.