Vicinage effects in the charge state of swift molecular constituents traversing thin foils
Departamento de Física, Universidad de Murcia Apartado
4021, E-30080 Murcia, Spain
2 Instituto Balseiro, Centro Atómico Bariloche RA-8400 Bariloche, Argentina
Accepted: 30 March 2001
We present a method to calculate the charge state of the atomic ions resulting from the fragmentation of swift molecular ions when traversing thin foils. The mutual influence of the neighbouring ions in the charge state of each atomic ion and the asymmetries in the screening close to the exit surface as each ion leaves the foil is taken into account. We have found the latter effect to be particularly important. Our calculations compare remarkably well with experimental data available for different molecular ions and foil thicknesses.
PACS: 34.50.Dy – Interactions of atoms and molecules with surfaces; photon and electron emission; neutralization of atoms / 34.50.Fa – Electronic excitation and ionization of atoms (including beam-foil excitation and ionization) / 36.40.Wa – Charged clusters
© EDP Sciences, 2001