Accession Number : AD0749136

Title :   Measurement and Analysis of the Fluorescence Decay of Gd(3+) in SrF2 versus the Concentration of Codopant Ce(3+).

Descriptive Note : Technical rept. 1 May 69-31 Dec 71,

Corporate Author : DAYTON UNIV OHIO RESEARCH INST

Personal Author(s) : Schaeffer,D. Michael ; Yaney,Perry Pappas

Report Date : JUL 1972

Pagination or Media Count : 128

Abstract : The fluorescence lifetimes of the sextet P(7/2) state of Gd(3+) in the assumed monoclinic (GCl) site and in the tetragonal (C(4v)) site of SrF2 for various concentrations of Ce(3+) as a codopant have been studied. Of particular interest was the GCl site which has been shown to arise in the presence of the Ce(3+) codopant. The excitation and decay modes of the two sites were analyzed in terms of the three-level model. Experimental techniques involved using the 'boxcar integrator' coupled to a logarithmic converter and an analog-to-digital data acquisition system. For the GCl site, strong Ce(3+)5d band adsorption at 2500A with exchange transfer directly to the sextet P(7/2) state of Gd(3+) was determined to be the most probable excitation and decay mode. Adsorption and fluorescence measurements over the Ce(3+) concentration range are also presented. (Author)

Descriptors :   (*GADOLINIUM, *FLUORESCENCE), RELAXATION TIME, DOPING, FLUORIDES, STRONTIUM COMPOUNDS, ELECTRON TRANSITIONS, MOLECULAR ENERGY LEVELS, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, CERIUM

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE