Experimental study of single-electron detachment for Cu−, Ag−, Au−, Co−, and Ir− in collisions with Kr and Xe

The single electron detachment (SED) cross sections for Cu−, Ag−, Au−, Co−, and Ir− in collisions with Kr and Xe in the energy range of 10keV≤E≤30keV are measured by using the growth rate method in our experiments. The SED cross sections increase as the incident velocity increases. These data are compared with other available experimental data for the corresponding negative ions colliding with Ar. The affinities of the negative ions and the mass relation between the projectile and the target seem important in the electron detachment process.