Radioluminescence of SrAl 2O 4:Ln 3+ (Ln = Eu, Sm, Dy) phosphor ceramic

Abstract

Phosphors for radiation detection require efficient energy transfer from the ionization track to the luminescent centers. In this work, the radioluminescence (RL) spectra of SrAl 2O 4 phosphor ceramics doped with individual trivalent rare earth element (REE) ions (Sm, Eu and Dy) are reported at the room temperature. Although there is some intrinsic UV/blue emission from the host lattice, the dominant signals are from the rare-earth sites, with signals characteristic of the REE 2+ and REE 3+ states. The shapes of the emission bands are different for each dopant. The sharp emission properties show that the SrAl 2O 4 is a suitable host for rare-earth ion doped phosphor material.