A theoretical analysis of magnetic circular dichroism ofthe ⁷F₀ → ⁵D₁ and ⁷F₁ → ⁵D₀ transitions in solutions of EuC

A theoretical analysis of MCD and absorption is made for transitions involving J = 0 and J = 1 states using a general field model. Magnetic dipole, electric dipole, and electric quadrupole contributions are considered. The ratio of absorption intensity to first moment of MCD is shown to depend on the g-factor and the fractional contribution of the various types of transition moments. The theory is applied to the ⁷F₀ → ⁵D₀ and anhydrous ethanol and leads to the conclusion that the europium ion has low symmetry in both solvents. The theory is also applied to the ⁷F₁ → ⁵D₀ transition of EuCl₃ in water.