Short Duration Phosphorescence in Fused Quartz

The short lived phosphorescence of fused quartz was found to have a decay constant of approximately 5×${10}^3$ ${\sec }^{-1\mathrm{}}$. The wave-length of the exciting radiation is less than 2270A. The phosphorescence radiation is a continuous band extending from 3700 to 4750A with a maximum at 4000A. Temperature changes from 20° to 240°C do not affect this phosphorescence. No phosphorescence of this type was observed in crystalline quartz.