OPTICAL-ABSORPTION, PHOTOLUMINESCENCE AND THERMALLY STIMULATED LUMINESCENCE OF CSCL DY CRYSTALS

Optical absorption, photoluminescence and thermoluminescence emission studies are made on CsCl : Dy3+ crystals at room temperature. The glow curve and optical absorption studies clearly show the participation o f dysprosium ions in the thermoluminescence process. The new high temp erature 458 K glow peak, which is not observed in pure CsCl is ascribe d to the dysprosium impurity and gives the characteristic emissions of the Dy3+ at 465, 560 nm due to transitions from the F-4(9/2) to the H -6 levels and confirmed by photoluminescence also.