Retention of the potential energy of multiply charged argon ions incident on copper - art. no. 105504

The retained fraction of the potential energy of argon ions incident on cop per has been measured using stationary calorimetry at charge states up to 9 + and kinetic energies ranging from 75 to 240 eV per ionic charge. An avera ge fraction of 30% to 40% is found with little dependence on the charge num ber and on the kinetic energy. The retention of the total energy ranges fro m 60% to 75% and call mainly be accounted for by the retained fraction of t he potential energy and the collisional energy lost by reflected ions and s puttered target atoms.