Gamma Irradiation of Ruby Laser Crystals
Document ID: 227
Philbrick, C. Russell
Davis, W. R.
Menius, Jr., A. C.
Moss, Marvin K.
Abstract
After CO60 γ-irradiation of ruby laser crystals, transmittance spectral studies showed that the laser absorption maximum centered in the green was left essentially unchanged while the transmittance at lower wave-lengths was greatly decreased, due at least in part to color center formations. However, absorption in the red around the laser lines was not significantly changed. Phosphorescence centered around the R1 line was observed from the ruby laser crystals immediately after the CO60 γ-irradiation. While the phosphorescence decayed with time, it could be partially restored by stimulation with visible and ultraviolet light. The intensity of the phosphorescence was also compared with the fluorescent emission of the ruby crystal under ultraviolet excitation. These studies led to the investigation of the effect of gamma irradiation on the energy output of ruby laser crystals. With controlled gamma irradiation, the energy output of the ruby laser was increased by several factors. The energy output was measured with a standardized calorimeter and simultaneously with a phototube. The laser output as a function of CO60 γ-irradiation dosage was studied.
Notes
Abstract only.
| Citation: | "Gamma Irradiation of Ruby Laser Crystals", Philbrick, C. R., W. R. Davis, A. C. Menius, Jr., M. K. Moss, Journal of the Elisha Mitchell Scientific Society, Vol. 80 No. 2, Elisha Mitchell Scientific Society, 1964, p. 1 |