SITE DETERMINATION OF THE SEXTUPLET I MULTIPLET SPECTRAL LINES OF Gd(+3) IN SrF2.

A concentration study of the sextuplet I spectrum of the Gd3 ion doped into a single crystalline SrF2 host Gd3SrF2 has resulted in the determination of those lines of the spectrum which arise from the tetragonal site. The site identification of these lines was accomplished by comparing the growth of the integrated absorption coefficients of each line as a function of dopant level to the growth patterns of the integrated absorption coefficients of the lines of similar site in the sixtuplet P spectrum of the same system. The sites of the sextuplet P spectrum in the Gd3SrF2 are well known. The study of the growth patterns of the sextuplet P spectral lines also demonstrated that the lines of different sites had dissimilar growth patterns, a fact which proved essential to the site identification of the sextuplet P spectral lines. Author