Advances in Mössbauer Emission Spectroscopy

After effects following nuclear transformation have been extensively studied in a large variety of matrices by Mössbauer Emission Spectroscopy (MES). The branching ratios of transient atomic charge states and energetically unstable states of the environment, excitations of electronic ligand field states and populations out of equilibrium within the electronic ground state manifold have been studied. Recent developments and also new insights and understandings of different aspects of the aftereffects of radioactive decay of⁵⁷Co in semiconductors and molecular crystals are reviewed. A detailed picture of the decay process within the electronic states of the nucleogenic Fe³⁺ species could be obtained from emission spectroscopy of sources in applied magnetic fields.