Accession Number : AD0690200

Title :   ESR AND OPTICAL ABSORPTION STUDIES OF TRANSITION METAL IONS AND COLOR CENTERS IN GLASS. PART I: TRANSITION METAL IONS IN GLASS AND ULTRAVIOLET INDUCED ROOM TEMPERATURE STABLE AND TRANSIENT COLOR CENTERS IN LASER SELF Q-SWITCHING GLASS. PART II: THEORETICAL INVESTIGATIONS OF IRRADIATION INDUCED COLOR CENTER DEFECTS IN GLASS.

Descriptive Note : Final rept. 1 Oct 67-31 Dec 68,

Corporate Author : AMERICAN OPTICAL CORP SOUTHBRIDGE MASS CENTRAL RESEARCH LAB

Personal Author(s) : Landry,R. J. ; Fournier,J. T.

Report Date : JUN 1969

Pagination or Media Count : 101

Abstract : Part I: Electron spin resonance and optical absorption studies of the isolated transition metal ions Cr(3+), Mo(3+), Mo(5+), and Cu(2+) in glass are described. The results of these and other studies of V(4+) and Cu(2+) suggest that the primary distinguishing feature between isolated transition metal ions in glasses and in well defined complexes lies in the greater site to site variation in local structure for these ions in glassy hosts. It is shown that the pairing interaction for Cr(3+) ions in phosphate glass is an antiferromagnetic exchange coupling one as was previously assumed. The results of other studies of Fe(3+), Ni(2+), and Mn(2+) in glass, which are summarized, strongly suggest that these ions also form exchange-coupled pairs in glass. Experimental studies of ultraviolet induced Room Temperature Stable (RTS) and transient color centers in laser glass are described. Part II: A theoretical study of the electronic structure of SiO4 tetrahedra with one and three non-bridging oxygens has been carried out to investigate possible correlations of the g-shifts of the associated trapped hole centers with values reported for an axially symmetric electron spin resonance spectrum in u.v. and x-ray irradiated alkali silicate glass. (Author)

Descriptors :   (*GLASS, *COLOR CENTERS), (*LASERS, GLASS), (*SILICATES, *MOLECULAR ORBITALS), TRANSITION METALS, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, ELECTRON PARAMAGNETIC RESONANCE, PHOSPHATE GLASS, CERAMIC MATERIALS, CHEMICAL BONDS, CHROMIUM, MOLYBDENUM, COPPER, VANADIUM, IRON, NICKEL, MANGANESE, WAVE FUNCTIONS, ANTIFERROMAGNETISM, MOLECULAR ENERGY LEVELS

Subject Categories : Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE