Cores that transmute beforehand of the γ γ - γ γ -cascade usually cause a charge change in ionic crystals (In) to Cd). As a result, the lattice must respond to these changes. Defects or neighboring ions can also migrate. Likewise, the high-energy transition process may cause the Auger effect, that can bring the core into higher ionization states. The normalization of the state of charge then depends on the conductivity of the material. In metals, the process takes place very quickly. This takes considerably longer in semiconductors and insulators. In all these processes, the hyperfine field changes. If this change falls within the γ γ - γ γ -cascade, it may be observed as an after effect.