A model of ion track structure based on classical collision dynamics

Area of Science:

• Physics
• Radiation Science
• Materials Science

Background:

• Understanding ion track structure is crucial for radiation effects.
• Accurate modeling of energy deposition is needed for various applications.

Purpose of the Study:

• To develop a model for calculating energy deposition in ion tracks as a function of radial distance.
• To determine the relationship between energy density and radial distance from the track center.
• To establish the dependence of the penumbra radius on ion kinetic energy and mass.

Main Methods:

• Classical collision dynamics were employed for calculations.
• Empirical range-energy relationships for electrons were utilized.
• The model's predictions were compared against experimental data.

Main Results:

• Energy density follows an inverse-square function with radial distance from the track center.
• The penumbra radius is described by a power function of the ion's kinetic energy divided by its mass.
• The model shows applicability for ion specific energies exceeding 1 MeV/nucleon.

Conclusions:

• The developed model provides a quantitative description of energy deposition in ion tracks.
• The findings are relevant for understanding radiation interactions and predicting radiation damage.
• The model's validation against experimental data supports its use in specific energy regimes.