CHARACTERISTICS OF PULSED LASER CRYSTALS AS A FUNCTION OF GAMMA IRRADIATION.
Abstract
A study of the laser characteristics of CaWO4:Nd(3+), CaMoO4:Nd(3+), LaF3:Nd(3+), LaF3:Pr(3+), CaMoO4:Nd(3+):Tm(3+), Y3Al5O12:Nd(3+), and Y3Al5O12:Nd(3+):Cr(3+) was made as a function of gamma irradiation. In particular, the Co60 gamma radiation produced absorption bands were studied for their effects relating to fluorescent efficiency. CaWO4:Nd(3+) and CaMoO4:Nd(3+) showed very little gamma induced center band structure. The efficiency of CaWO4:Nd(3+) decreased substantially as a function of gamma dose; however, the efficiency of CaMoO4:Nd(3+) was only slightly decreased by a total dose of 2 MR. The doped LaF3 crystals showed a substantial gamma induced center band structure. However, only the LaF3:Pr(3+) exhibited interesting laser characteristics. The efficiency of Y3Al5O12:Nd(3+):Cr(3+) was increased significantly by gamma irradiation, first appearing at a dose level of 2,000 R and continuing to a total dose of 15,000 R. At a dose of 20,000 R the overall efficiency had decreased slightly. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1966
- Accession Number
- AD0650120
Entities
People
- Benjamin T. Gravely
- Grover C. Cobb
- Marvin K. Moss
- William R. Davis
- Williams C. Collins
Organizations
- North Carolina State University