Energies and radiation lifetimes of high lying Rydberg states of lutetium

The 4f146s2 nl(l = 0, 1, 2, n = 10-50) Rydberg states of Lu have been theoretically investigated. The energies and radiation lifetimes of these states have been calculated using relativistic perturbation theory with a zero-order model approximation. The con-tribution of the main channels of the Rydberg electron radiation decay has been considered in detail. The energy accuracy reaches ∼1%. Interesting non-Coulomb properties have been predicted, their action is particularly strong in the radiation decay processes. (author)