STUDY OF LI-SCATTERING( ION HYDRATION BY INELASTIC NEUTRON)

The data analysis of the slow neutron scattering on 2M solution of LiC l is presented. The quasi-elastic and inelastic components of the inco herent scattering function S-s(Q,epsilon) have been considered. From t he analysis of quasi-elastic component it was established that there a re four water molecules in hydration shell of Li+ ion, and their resid ence time in the hydration shell is tau(0) = 25 +/- 10 ps. The diffusi on coefficient of Li+, D-ion = (0.79 +/- 0.05) x 10(-5) cm(2)/s, has b een obtained also from quasi-elastic component of S-s(Q,epsilon). The generalized frequency distribution (GFD) for hydration water molecules has been extracted from inelastic part of neutron scattered spectra. A comparison of CFD of hydration water molecules and GFD of pure water gives the information concerning the ion's influence on the rotation- vibration motions of surrounding water molecules.