Secondary ions from condensed gas solids by singly and multiply charged ion impacts

Ion desorption from a condensed gas solid Ne impacted by singly- and multiply-charged Arq+ ions (q = 1-7) has been investigated. Various secondary ions such as cluster ions, Ne+n (n = 2-20) as well as atomic ions are observed. Mass spectral patterns, thickness dependence of the yields, and kinetic energy distributions of the desorbed Ne+n (n = 1,2) depend strongly on the projectile charge state. These results indicate that the dissipation of the projectile potential energy on the surface leads to the desorption of the monomer and small cluster ions by a Coulomb repulsion between adjacent target ions.