Studies of the hyperfine interaction of¹¹¹Cd in gaseous InCl and InCl₃ systems

Abstract

Using the perturbed γ-γ angular correlation at excited¹¹¹Cd-ions from the decay of¹¹¹In, the time-integral attenuation coefficientG ₂₂(∞) was measured in gaseous InCl and InCl₃ surroundings. The perturbation depends as well on the character and the density of the surrounding gas, as on the angular momentum of the electronic shell of the Cd-ion.G ₂₂(∞) varied between 0.012 and 0.828, while the molecule densities varied between 2×10¹⁴ and 2×10²⁰ molecules/cm³. For high densities it is to be noted, that the perturbation vanishes much faster for the InCl systems. Using a stochastic model, it is possible to calculate the mean hyperfine frequency Ω₀, and to estimate cross-sections for molecule-ion collisions at thermal energies.