Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Shower approach in the simulation of ion scattering from solids
Year:2011
Research Areas
  • Engineering
Information
Abstract
An efficient approach for the simulation of ion scattering from solids is proposed. For every encountered atom, we take multiple samples of its thermal displacements among thosewhich result in scattering with high probability to finally reach the detector. As a result, the detector is illuminated by intensive ?showers,? where each event of detection must be weighted according to the actual probability of the atom displacement. The computational cost of such simulation is orders of magnitude lower than in the direct approach, and a comprehensive analysis of multiple and plural scattering effects becomes possible. We use this method for two purposes. First, the accuracy of the approximate approaches, developed mainly for ion-beam structural analysis, is verified. Second, the possibility to reproduce a wide class of experimental conditions is used to analyze some basic features of ion-solid collisions: the role of double violent collisions in low-energy ion scattering; the origin of the ?surface peak? in scattering from amorphous samples; the low-energy tail in the energy spectra of scatteredmedium-energy ions due to plural scattering; and the degradation of blocking patterns in two-dimensional angular distributions with increasing depth of scattering. As an example of simulation for ions of MeV energies, we verify the time reversibility for channeling and blocking of 1-MeV protons in a W crystal. The possibilities of analysis that our approach offers may be very useful for various applications, in particular, for structural analysis with atomic resolution.
International
Si
JCR
Si
Title
Physical Review E 83, 056707
ISBN
1550-2376
Impact factor JCR
0
Impact info
Volume
83
doi: 10.1103/PhysRevE.83.056707
Journal number
From page
1
To page
14
Month
SIN MES
Ranking
Participants
  • Autor: V.A. Khodyrev (Institute of Nuclear Physics, Moscow)
  • Autor: R. Andrzejewski (Centro de Microanálisis de Materiales, UAM)
  • Autor: Antonio Juan Rivera de Mena (UPM)
  • Autor: D.O. Boerma (Centro de Microanálisis de Materiales, UAM)
  • Autor: J.E. Prieto (Centro de Microanálisis de Materiales, UAM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
  • Centro o Instituto I+D+i: Instituto de Fusión Nuclear
  • Departamento: Ingeniería Nuclear
S2i 2021 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)