Welcome to Ionscattering.org

In this website you can download Flatus, a simulation software for high resolution depth profiling techniques using ion beams, namely Medium Energy Ion Scattering (MEIS) and Resonant Nuclear Reaction Profiling (RNRP). Flatus is based on advanced ion energy loss models for ion matter interactions in the medium energy regime - see references, below.

Download Flatus

Flatus was developed by Rafael Pezzi. During his undergraduate and master studies his work was focused on the implementation of numerical solutions of the stochastic theory of energy loss in matter for Resonant Nuclear Reaction Analysis (RNRA). The development of energy loss models for MEIS and its implementation for MEIS was accomplished during his PhD.

Flatus implements state of the art ion energy loss models for the simulation of RNRA and MEIS spectra without multiple scattering. Details about the models can be found in the references, bellow.

Download Flatus 3.0 beta

Use Flatus 3 for the simutaion of Resonant Nuclear Reaction Analysis and Medium Energy Ion Scattering (MEIS) spectra for elemental depth profiling.

Energy correction values for single collisions can be obtained from CasP. This correction considers the energy lost during the small impact parameter collision.

Download Flatus 2.0

Use Flatus 2 for the simulation of Resonant Nuclear Reaction Analysis (RNRA) for elemental depth profiling.

The development of an open source version of Flatus started by Matheus Muller, released under the GPL 3.0. OpenFlatus is available in this git repository.


[1] Advanced ion energy loss models: Applications to subnanometric resolution elemental depth profiling. Surface Science 601, 5559 (2007) doi:10.1016/j.susc.2007.09.026

[2] Analytical energy loss distribution for accurate high resolution depth profiling using medium energy ion scattering. Applied Physics Letters 92, 164102 (2008) doi:10.1063/1.2918443

[3] An analytical energy-loss line shape for high depth resolution in ion-beam analysis. Nuclear Instruments and Methods in Physics Research B 256, 92 (2007) doi:10.1016/j.nimb.2006.11.124

[4] SPACES: a PC implementation of the stochastic theory of energy loss for narrow-resonance depth profiling. Nuclear Instruments and Methods in Physics Research B, 45, 1-4, 6 (1990) doi:10.1016/0168-583X(90)90772-M

[5] Pezzi, R. P.. Análise de materiais nanoestruturados utilizando feixes de íons. Porto Alegre: Biblioteca IF/UFRGS, 2008 (PhD Thesis), uri:http://hdl.handle.net/10183/15286

[6] PEZZI, R. P.. Avanços na determinação da distribuição em profundidade de elementos leves com resolução subnanométrica utilizando reações nucleares ressonantes. Porto Alegre: Biblioteca IF/UFRGS, 2004 (Dissertação de Mestrado), uri:http://hdl.handle.net/10183/5484.