Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 250, Issue -, Pages 263-268Publisher
ELSEVIER
DOI: 10.1016/j.nimb.2006.04.163
Keywords
electronic energy loss; effective charge; surface; thin film
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When dealing with surface and/or thin film modifications of materials under irradiation by swift heavy ions, special attention should be given to the choice the incident projectile charge state delivered by the accelerator. This charge state should be of the order of the effective charge defined in the electronic energy loss theory. Under some hypothesis, this effective charge is assumed to be equivalent to the mean charge state deduced from measurements of ion charge state distribution. To reach such a charge state, it is necessary to introduce before the irradiated sample a thin stripper foil of carbon, the thickness of which is in between similar to 5 and similar to 1500 mu g/cm(2) for beam energies ranging between 1 and 44 MeV/u, respectively. (c) 2006 Elsevier B.V. All rights reserved.
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