title: Direct evidence for projectile charge-state dependent crater formation due to fast ions.
abstract: We report on craters formed by individual 3 MeV/u Au (q(ini)+) ions of selected incident charge states q_(ini) penetrating thin layers of poly(methyl methacrylate). Holes and raised regions are formed around the region of the impact, with sizes that depend strongly and differently on q_(ini). Variation of q_(ini) of the film thickness and of the angle of incidence allows us to extract information about the depth of origin contributing to different crater features.
authors.affiliation: Faculty of Physics, Catholic University of Rio Grande do Sul, Avenida Ipiranga 6681, Porto Alegre, Brazil.
authors.forename: R M
authors.initials: RM
authors.lastname: Papaléo
authors.forename: M R
authors.initials: MR
authors.lastname: Silva
authors.forename: R
authors.initials: R
authors.lastname: Leal
authors.forename: P L
authors.initials: PL
authors.lastname: Grande
authors.forename: M
authors.initials: M
authors.lastname: Roth
authors.forename: B
authors.initials: B
authors.lastname: Schattat
authors.forename: G
authors.initials: G
authors.lastname: Schiwietz