Time differential perturbed angular correlation studies with154Gd in a liquid environment at different temperatures

The perturbation of gamma-gamma angular correlations in the 1.17 ns 2+ state of¹⁵⁴Gd has been studied by using the¹⁵⁴Eu activity dissolved in 6N HClO₄. Time differential measurements were performed at five different temperatures between 0 °C and ?80 °C. The environment remains in the liquid phase in the whole temperature range and the attenuation of the angular correlations can be described by the theory of Abragam and Pound⁵. The observed attenuation parameters λ₂ and λ₄ were used to derive separately the strengths of the magnetic dipole interaction and the electric quadrupole interaction between the nuclei and their environment. The observed temperature dependence of the magnetic dipole and electric quadrupole interaction strength can be understood by a simple model of the attenuation mechanism.