Thermoluminescence and laser Raman studies on RbI:Gd²⁺

TL glow of RbI:Gd2+ shows a single peak. During a TL process aggregation of V-centres is observed. Laser Raman spectra show two lines at 111 cm-1 and around 150 cm-1. Doping of the Gd2+ ions enhances the aggregation. TL emission contains two bands at 2.6 and 2.9 eV. The 2.9 eV band in TL emission is attributed to the impurity. From photostimulated emission studies the TL process is identified as due to the thermal release of F-electrons. © 1988.