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Degradation of polystyrene thin films under d,4He and12C irradiation studied by ion beam analysis: effects of energy loss, sample thickness and isotopic content

Authors
Journal
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms
0168-583X
Publisher
Elsevier
Publication Date
Volume
105
Identifiers
DOI: 10.1016/0168-583x(95)00549-8
Keywords
  • Section Ii. Surface And Bulk Modificiations
Disciplines
  • Chemistry

Abstract

Abstract Changes in atomic composition (C, H and D) of thin polystyrene films under d, 4He or 12C irradiations were studied by nuclear reaction analysis (NRA) and elastic recoil detection analysis (ERDA) for ion energies between 150 and 2500 keV, corresponding to stopping powers 5 to 104 eV/Å. A multiscale setup was used to study atomic losses in real time during irradiation. It was shown that the first ion interacting with previously unirradiated polymer already produces matter losses; that no stable limit state exists at high doses; that there is a steep increase of losses above dE dx ≈ 35 eV / A ̊ for the ions studied; that losses are thickness dependent; that H losses are always larger than D ones, without any influence of initial chemical bonding of these atoms. These results are briefly discussed.

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