Velocity effect in swift heavy ion irradiation: how the low- and high- energy track formation thresholds meet

RA Rymzhanov and N Medvedev and AE Volkov, JOURNAL OF MATERIALS SCIENCE, 58, 14072-14079 (2023).

DOI: 10.1007/s10853-023-08898-2

Variations of the threshold of swift heavy ion track formation with the ion energy and mass are studied here. We apply the hybrid multiscale approach combining TREKIS-3 code describing the electronic kinetics with the classical molecular dynamics tracing the evolution of the excited lattice. The results demonstrate that with a lowering of the energy loss curve (by choosing lighter ions for irradiation), the high-velocity threshold starts to shift down, whereas the low-velocity one remains constant until the thresholds meet. For certain ion parameters, a situation is possible in which both thresholds (low- and high-velocity) lie at the low-energy shoulder of the Bragg curve which results from the mismatch between the ion energy positions of the maximal track radius and the Bragg peak.

Return to Publications page