Effect of energy loss on the lateral spread of MeV helium ions in C, Al, and Cu: Comparison with experimental data
DOI:
https://doi.org/10.31349/RevMexFis.72.050401Keywords:
Lateral spread, multiple scattering, transport theory , interaction potential, energy loss, depth-resolutionAbstract
The Marwick-Sigmund model has been widely used to calculate the lateral spread of ions transmitted through matter. However, this model neglects the effect of ion energy loss within the target material. In this study, the model was employed to calculate the lateral spread distributions of MeV helium ions transmitted through carbon, aluminum, and copper targets. Ion energy loss was incorporated into the calculations using an approach analogous to that used for determining the angular distributions of transmitted ions. A comparison of our results with experimental data indicates that incorporating energy loss substantially enhances the overall agreement. Furthermore, this approach provides a rigorous method to account for lateral spread in depth resolution estimates for ion-beam analysis, particularly when nuclear stopping is a significant component of total stopping power.
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