Untersuchung der Strahlungsreduktiön von Metallionen durch γ-Resonanzmessungen

The mechanism of the reduction of metal ions by mercury light and X-rays in the solid state is examined for the case of the potassium- and ammonium iron oxalates. From the dependence of the reduction yield on temperature and on the wavelength of the reducing radiation, it follows that the primary process is a charge transfer from the ligand system to the metal ion. The new charge state is stabilized by destruction of the complex. Several chemical reactions following this event give products which can be identified by theirγ-resonance spectra. One of them shows an unexpected large quadrupole splitting which is compared with the calculations of Ingalls. The results of experiments on iron and some rare earths suggest that no unusual charge state is produced in this way.