The study of neutral pion azimuthal distribution in 58Ni+58Ni reaction at 2 GeV/nucleon

In order to study the anisotropic azimuthal emission of mesons in heavy ion collisions we measured the neutral pions emitted in the Ni+Ni collisions at 2 GeV/u with respect to the reaction plane. We studied the strength of the azimuthal anisotropy for neutral pions in dependence of the transverse momentum and impact parameter. The preliminary results and their comparison with previous experimental data are reported.     

A197Au Mössbauer study of the adsorption of aurocyanide onto activated carbon

The chemical state of gold adsorbed on activated carbon from solutions of KAu(CN)₂ has been studied by¹⁹⁷Au Mössbauer spectroscopy as a function of the pH and concentration of the solution, the loading of the carbon, and the drying conditions of the samples. On freshly prepared specimens Au(CN) ₂ ^? is always the dominant species. Drying leads to the formation of other forms of gold, mainly in samples loaded from strongly acidic media. An oligomeric form of AuCN is, however, also formed when samples loaded at high pH values are dried at temperatures around 100°C.