STIMULATED INFRARED EMISSION FROM TRIVALENT URANIUM

Stimulated infrared emission from uranium(III) in CaF/sub 2/ was studied using a single CaF/sub 2/ crystal with 0.05 mole% uranium and silver films on both ends. The crystal was cooled with liquid helium and excited by a pulsed xenon discharge, and the radiation was isolated at 2.5 mu and detected. Oscilloscope traces of the detector response showed the ratio between the stimulated emission and the background light to be>1000 and relaxation oscillations to be present, the number of spikes increasing with the power of the xenon discharge. (D.L.C.)