Quadrupole Interaction and Isomer Shifts of the 23.8 KeV Gamma Transition of the Sn119 Nucleus in Tin-Organic Compounds

The first investigations /1,2/ of the spectrums of Mossbauer resonance absorption of the 23.8 KeV gamma quantums, for the Sn119 nucleuses in tin-organic compounds, showed that such measurements could give very valuable information as to the dirtribution of electron charge in the molecule and its variation with the structure of the molecule ond the properties of its chemical bonds. From the resonance absorption spectrums it is possible to determine two quantities characteristic of the interaction of the nucleus with the electric field of the electrons in the molecule ; these are the isomer energy shift of the gamma transition and the constant of quadripole interaction. The magnitude of the isomer shift (denoted below by the symbol d) is given to a first approximation by the formula (Math) where c is a constant, Re and FL are the effective charge distribution radiuses in the excited and ground states of the nucleus, ?I(0) and ?II(0) are the wave functions of the electrons in the region of the nucleus for the two chemical compounds, and EI and EII are the gamma transition energies in these compounds. Since for the Sn119