On the Radial Dependence of the Fluorescence-Quenching Interaction between Rare-Earth Ions

Abstract

The radial dependence of the quenching interaction between rare‐earth ions has been studied through observation of the Tb³⁺ fluorescence lifetime in samples of Gd_1–2cTb_cHo_cCl₃·6H₂O. The probability for a quenching interaction, P_Int, has been determined to be P_Int∝c²∝1/r⁶. On the basis of the ``resonance'' transfer of energy, such a radial dependence implies a dipole—dipole interaction. Other experiments are discussed in which identical results are obtained.