STUDIES OF CENTERS PRODUCED IN SAPPHIRE AND RUBY BY GAMMA RADIATION.
Final scientific rept. (Part III) 8 Oct 65-7 Dec 66,
NORTH CAROLINA STATE UNIV RALEIGH PHYSICAL SCIENCE RESEARCH
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Centers produced by the gamma irradiation of laser crystals are known to strongly affect laser characteristics. The centers produced by gamma radiation in sapphire and ruby crystals were studied using several experimental techniques. The optical absorption of gamma-radiation-induced center bands was studied using plane polarized light to investigate the optical properties along axes perpendicular and parallel to the C-axis. This technique permits determination of the anisotropy of the radiation-produced centers. The detailed studies of the optical center bands contributed to the identification of the various components of the center band structure. In addition, the results of studies of glow curve measurements, thermoluminescent emission spectra, electrical conduction and step annealing are reported and discussed for the case of centers produced in ruby and sapphire crystals by gamma radiation. Also, the thermal activation energies of the traps associated with the sapphire centers were calculated by three different methods and found to be in good agreement. Author
- Lasers and Masers
- Solid State Physics