Some Studies of Relaxation Processes in Tb^3+ Using Pulsed Excitation

Abstract

In this paper the relaxation paths of Tb³⁺ in two hosts, SrMoO₄ and Na_0.5Eu_0.5WO₄, are studied using pulsed and continuous illumination. In the molybdate structure we find that resonance coupling between the host lattice and the rare earths strongly influences the energy levels excited. The doping of Na_0.5Eu_0.5WO₄ with Tb results in a rare-earth-ion–rare-earth-ion resonance-coupled system in which the Eu may be excited by pumping the Tb.