On the missing single collision peak in low energy heavy ion scattering

R. A. Wilhelm*, M. J. Deuzeman, S. Rai, W. Husinsky, P. S. Szabo, H. Biber, R. Stadlmayr, C. Cupak, J. Hundsbichler, C. Lemell, W. Möller, A. Mutzke, G. Hobler, F. Aumayr, R. Hoekstra

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

We present experimental and simulation data on the oblique angle scattering of heavy Sn ions at 14 keV energy from a Mo surface. The simulations are performed with the binary collision approximation codes TRIM, TRIDYN, TRI3DYN, SDTrimSP, and IMSIL. Additional simulations were performed in the molecular dynamics framework with LAMMPS. Our key finding is the absence of an expected peak in the experimental energy spectrum of backscattered Sn ions associated with the pure single collision regime. In sharp contrast to this, however, all simulation codes we applied do show a prominent single collision signature both in the energy spectrum and in the angular scatter pattern. We discuss the possible origin of this important discrepancy and show in the process, that widely used binary collision approximation codes may contain hidden parameters important to know and to understand.

Original languageEnglish
Article number165123
Number of pages12
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume544
DOIs
Publication statusPublished - Nov-2023

Keywords

  • Binary collision approximation
  • Heavy ions
  • Ion scattering
  • Molecular dynamics

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