Abstract
The interaction of Sm 3+ ions in borate glasses doped with different concentration has been investigated. The decay curves become nonexponential when the Sm 3+ concentration is larger than 1 mo1%. It can be explained by cross relaxation between Sm 3+ ions. By fitting the experimental data to the model of Inokuti and Hirayama, the cross relaxation has been assigned to be of electric dipole-dipole character (EDD). According to Dexter's theory, the transfer probabilities for four pairs of possible cross relaxation were estimated. The intensity parameters of Sm 3+ in borate glass, which are used in the estimation of transfer probabilities, were calculated by the use of emission spectra.
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