# Carbon elastic and inelastic stopping-power components for heavy ions at Bohr and higher velocities

## TL;DR

This paper analyzes the elastic and inelastic stopping-power components for heavy ions at Bohr and higher velocities, revealing discrepancies with SRIM/TRIM predictions and extracting empirical data on collisional components.

## Contribution

It introduces a method to separate elastic and inelastic stopping-power components from experimental data at high velocities, addressing limitations of existing models.

## Key findings

- Experimental data show lower stopping-power values than SRIM/TRIM predictions.
- At high velocities, collisional and electronic components are comparable, affecting analysis.
- Empirical extraction of collisional stopping-power component improves understanding of heavy ion interactions.

## Abstract

Carbon stopping-power (SP) data for heavy ions (HIs), obtained around Bohr velocities, revealed remarkably lower values than those predicted by the SRIM/TRIM calculations/simulations. An attempt was made to extract the elastic (collisional) and inelastic (electronic) components from available SP data. A problem is that essentially total SP is measured in experiments, whereas electronic SP values, presented as the results, are obtained by the subtraction of the calculated collisional component values from the measured ones. At high HI reduced velocities (V/v0)/Z_HI^2/3 > 0.3 (V and v0 are HI and Bohr velocities, respectively, and Z_HI is the HI atomic number), the collisional component can be neglected, whereas at Bohr velocities it becomes comparable to the electronic one. These circumstances were used to compare the experimental data with SRIM/TRIM calculations/simulations and to extract empirically the collisional SP component.