Accession Number:

AD0650120

Title:

CHARACTERISTICS OF PULSED LASER CRYSTALS AS A FUNCTION OF GAMMA IRRADIATION.

Descriptive Note:

Final scientific rept. (Part I) 8 Oct 65-7 Dec 66,

Corporate Author:

NORTH CAROLINA STATE UNIV RALEIGH PHYSICAL SCIENCE RESEARCH

Report Date:

1966-12-01

Pagination or Media Count:

50.0

Abstract:

A study of the laser characteristics of CaWO4Nd3, CaMoO4Nd3, LaF3Nd3, LaF3Pr3, CaMoO4Nd3Tm3, Y3Al5O12Nd3, and Y3Al5O12Nd3Cr3 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. CaWO4Nd3 and CaMoO4Nd3 showed very little gamma induced center band structure. The efficiency of CaWO4Nd3 decreased substantially as a function of gamma dose however, the efficiency of CaMoO4Nd3 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 LaF3Pr3 exhibited interesting laser characteristics. The efficiency of Y3Al5O12Nd3Cr3 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

Subject Categories:

  • Lasers and Masers
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE