DOUBLE DIFFERENTIAL CROSS-SECTIONS FOR SOFT ELECTRON-EMISSION IN IONIZATION OF HYDROGEN BY BARE CARBON-IONS

The double differential cross sections (DDCS) for low energy electron emission can provide stringent tests of the theoretical models for ion ization in ion-atom collisions. We have measured the DDCS (d(2) sigma/ d Omega d epsilon) of soft electron emission in the ionization of H-2 bombarded by bare Carbon ions of energy 1.84 and 2.5 MeV/u. The measur ements have been carried out for different emission angles (theta) and for electron energies (epsilon) between 0.1 and 300eV. The angular di stributions of the DDCS for electrons with fixed energies were found t o peak around 70-75 degrees. The data have been compared with CDW-EIS and FBA calculations.